The lungs expand as a result of the diaphragm and rib muscles contracting during inhalation. Air enters the nose or mouth, travels through the trachea and bronchi, and then exits into the alveoli.
The lungs' volume decreases as a result of the diaphragm and rib muscles relaxing during exhalation. Air leaves the alveoli and travels up the bronchi, trachea, and bronchi before leaving through the mouth or nose.
Which of the following statements most accurately sums up ventilation?Gas exchange is the process of bringing oxygen from the outside world into the body and releasing carbon dioxide from the body back into the outside world.
To know more about inhalation and exhalation visit:
https://brainly.com/question/4550835
#SPJ4
At the start of a 100-yard dash (race), your body relies on which reserve as its energy source?.
The human body reserves creatinine phosphate as the energy source at the start of 100 yard dash (race).
The creatinine phosphate is converted into ATP, which is the energy package of our body. ATP is body's usable form of energy. Energy is stored in various forms in our body such as fats, carbohydrates and proteins. At a microscopic level, it is stored in molecules like creatinine phosphate. Carbohydrate and fats are the primary source of our body followed by proteins.
Our body uses three different forms of metabolism to convert these molecules in ATPs. These three processes are Phosphagen System, Aerobic Respiration and Glycolic/Anaerobic respiration.
To know more about Energy Source:
https://brainly.com/question/1914178
#SPJ4
a cancerous tumor located on an exposed area that does not distort the face or its features should be
The mastoid process is located behind and below the auditory canal, lateral to the styloid process, and has the form of a conical or pyramidal projection. It forms a bony prominence behind and below the ear.
Submandibular area. A recurved margin having a greater projection than the adjacent area physiognomically describes a. Bend. A fissure in the skin accompanied by bordering elevations physiognomically described. A furrow or furrow. Most sunken eyes can be treated with synthetic fillers or, even better, with your body's own fat cells. Lower eyelid surgery (lower blepharoplasty) may also be needed if the problem is a deep tear pit with a protruding lower eyelid fat pad. Trochanter. This landmark is present only in the femur and refers to a very large, blunt, and irregularly shaped process of the femur that serves as an attachment point for muscles and ligaments. On the femur there is a greater trochanter and a less prominent lesser trochanter.
To learn more about Submandibular please click on below link
https://brainly.com/question/13195819
#SPJ4
what evidence has been cited by scientists who propose that alcohol use disorder is related to endogenous opioid production?
Opioid antagonists can lessen the euphoric feeling associated with drinking. It has been referenced by researchers who contend that alcohol use disorder and endogenous opioid production are linked.
Endogenous opioid peptides can be released in response to a variety of uncomfortable, stressful, or traumatic events, these peptides work to lessen both human and animal sensitivity to unpleasant stimuli. Alcohol and opioids share similar neuronal circuits in activation and may interfere with the brain's pain signaling pathways . How a person reacts to alcohol is influenced by their genetic make-up, body mass index, gender, age, choice of beverage, amount of food in their stomach, presence of drugs in their system, and level of health. Peer pressures, sexual and physical abuse, early drug exposure, stress, and parental supervision are just a few examples of factors that can significantly impact someone's chance of using drugs and becoming addicted. Development. Environmental and genetic influences coexist.
Learn more about opioid
https://brainly.com/question/26332595
#SPJ4
Why are mutations in body cells not a source of genetic variation?.
This is due to the fact that mutations in body cells have no effect on the DNA of eggs and sperm. While this prevents many harmful mutations from wreaking havoc on offspring, it also reduces diversity and the ability to adapt to changing environments. Sexual reproduction, on the other hand, compensates for this loss, at least in part.
What are some examples of genetic variation?
Genetic variation results in different forms of genes, known as alleles. People with blue eyes, for example, have one allele of the eye color gene, whereas people with brown eyes have a different allele of the gene.
There are three sources of genetic diversity: mutation, recombination, and gene immigration. The driving force behind genetic variation and evolution is mutation.
Learn more about Genetic variation to visit this link
https://brainly.com/question/848479
#SPJ4
As you continued to experiment with higher concentrations of the toxin, you found cases when the cell could not repolarize at all, or if it began to repolarize, it would immediately depolarize again. Given this description and the description in the previous question, how does this toxin acts on voltage-gated sodium ion channels? The toxin probably prevents the potassium channels from opening. This would cause the cell to depolarize properly but not repolarize since the potassium channels are needed for that to occur. The toxin probably prevents the sodium channels from opening. The cell would not be able to depolarize properly if the sodium channels are blocked. The toxin probably prevents the sodium channels from closing once they are opened. This would cause the cell to depolarize properly at first, but not repolarize since the sodium channels need to close for that to occur. The toxin probably prevents the sodium channels from opening. The cell would not be able to repolarize properly if the sodium channels are blocked. none of these
This toxin may act on voltage-gated sodium ion channels and fail to reset the inactivating gates of sodium ion channels. This is required for repolarization to occur. It's also possible that the sodium channels are simply stuck open.
What are sodium ion channels?Sodium channels are integral membrane proteins that form ion channels and transport sodium ions (Na+) across cell membranes. There are two main classes of mammalian sodium channels: Voltage-gated sodium channel (VGSC) family and epithelial sodium channel (ESC). Voltage-gated sodium channels are present in various cell types throughout the body, whereas epithelial sodium channels are mainly localized to the skin and kidney.
Sodium channels play a key role in physiology. They rapidly transmit depolarizing impulses through cells and cellular networks, thereby enabling the coordination of higher-order processes ranging from locomotion to perception. These channels are also of particular importance in the history of physiology.
To know more about sodium channels, visit:
https://brainly.com/question/11664972
#SPJ4
a band of nervous tissue that lies along the midline of the cerebellum between the right and left cerebellar lobes is called the .
The cerebellum has two hemispheres (left and right). They are connected by a midline mass called the vermis.
The unpaired, middle region of the cerebellum that links the two hemispheres is known as the vermis. The lobules that make up the vermis and hemispheres are created by collections of folia. The anterior, posterior, and flocculonodular lobes of the vermis are similarly three in number. The lingula, central lobule, culmen, clivus, folium of the vermis, tuber, pyramid, uvula, and nodule are among the vermis' nine lobules.
To learn more about cerebellum click here,
https://brainly.com/question/13504830
#SPJ4
t/f: a dna mutation that affects the primary structure of the alpha-globin protein subunit would also affect the primary structure of the beta-globin protein subunit. (T/F)
(F)alse
False. A DNA mutation that affects the primary structure of the alpha-globin protein subunit would not affect the primary structure of the beta-globin protein subunit.
A mutation is a change in an organism's DNA sequence. Mutations can occur as a result of errors in DNA replication during cell division, mutagen exposure, or viral infection.
Genetic mutations are changes to your DNA sequence that occur during cell division, which occurs when your cells replicate themselves. Your DNA code instructs your body on how to form and function. Genetic mutations may cause genetic diseases such as cancer, or they may help humans better adapt to their environment over time.
The HBB gene codes for the production of a protein known as beta-globin. The HBA1 gene codes for the production of a protein known as alpha-globin.
Alpha-globin is a subunit (component) of hemoglobin, the protein found in red blood cells that transports oxygen to cells and tissues throughout the body. Beta-globin is a component (subunit) of hemoglobin, a larger protein found inside red blood cells. In adults, hemoglobin normally consists of four protein subunits: two beta-globin subunits and two alpha-globin subunits produced by another gene called HBA.
For more information on DNA mutation, visit ;
https://brainly.com/question/14067753
#SPJ4
The most important large molecules found in all living things can be sorted into just four main classes: carbohydrates, lipids, proteins, and nucleic acids. On the molecular scale, members of three of these classes--carbohydrates, proteins, and nucleic acids--are huge and are therefore called
Since those large molecules, which are carbohydrates, proteins, lipids (fats) and nucleic acids, are "large" or "huge", then the molecules are called macromolecules. Macro- means "being large".
Macromolecules are any large molecules ranging from about 100 to 10,000 angstroms in size. They are composed of much larger numbers of atoms than micromolecules are.
Carbohydrates are macromolecules that are also called sugar molecules. They are the main source of energy for living beings, including humans.
Fats (also known as lipids) are used as major and dense source of food energy for many animals. Fats play important structural and metabolic functions, including thermal insulation and energy storage.
Proteins are macromolecules that perform a vast array of functions within organisms, including DNA replication, catalysing metabolic reactions, responding to stimuli, providing structure to organisms and cells, and transporting molecules from a location to another.
Nucleic acids are macromolecules that are essential to all known forms of life. There are two main classes of nucleic acids, which are DNA and RNA.
Learn more about macromolecules at https://brainly.com/question/5246898.
#SPJ4
gram-negative enteric bacteria, such as salmonella and e. coli, are designated by the following antigens: for the flagellar antigen; for the capsular antigen; and for the cell wall antigen.
H stands for the flagellar antigen, K for the capsular antigen, and O for the antigen found on cell walls.
Which two E coli pathotypes are specifically linked to diarrhea in children?The thermostable toxin and the thermolabile toxin, which are encoded by plasmids, are the two enterotoxins that distinguish ETEC strains. Among all E. coli pathotypes, this pathogen is the most frequent cause of diarrhea in children and the main factor in developing country travelers' diarrhea.
Which of the following is a typical salmonella host?Raw meat, poultry, and seafood are frequently contaminated foods. During the butchering process, feces may contact raw meat and poultry. If it was harvested from contaminated water, seafood might be contaminated.
To know more about antigen visit:-
https://brainly.com/question/15694610
#SPJ4
Abraham maslow studied the lives of people such as abraham lincoln in order to understand the nature of.
Abraham maslow studied the lives of people such as abraham lincoln in order to understand the nature of self-actualization.
How do you explain self-actualization ?Depending on who you ask, self-actualization might mean many different things.Abraham Maslow, a humanistic psychologist, provided one of the definitions that is most commonly used. Being "all you are capable of being" is how he defined self-actualization.The same concept is described by San Diego therapist Kim Egel as the "capacity to become the best version of oneself."Self-Actualization examples. (1943 Maslow). Extrapolating from this phrase, we may witness self-actualization in situations like: A painter who produces work even though he has never made a profit from it continues to do so because it gives him satisfaction and makes him happy.As human beings, we have fundamental psychological requirements for lifelong personal development.
Learn more about self-actualization refer to :
https://brainly.com/question/7059459
#SPJ1
A circular plasmid has two restriction sites for the enzyme Zsp2I, which cleaves the site ATGCA↓T (the arrow indicates the position of the cleavage). After digestion the fragments are ligated together, and a circular product is isolated that includes one copy of each of the fragments. Does this mean that the ligated plasmid is the same as the original? Explain.
The circular product is not having the same plasmids as before but the plasmids have same restriction sites that's why they able to ligate.
Circular plasmids: What are they?Plasmids are small, circular, extra-chromosomal DNA molecules found in a wide range of microorganisms, most notably bacteria, that can replicate independently of their hosts.
Whether or not the bacterial host is replicating its own DNA, plasmids can be copied numerous times, and each time a plasmid vector is copied, the introduced DNA it contains is as well. They are rounded. Circular DNA is ideal for incorporating additional DNA sequences.
Although occasionally linear or RNA-based plasmids exist, plasmids are typically circular DNA molecules. They can be single or multiple copies, and they can contain anywhere between a few dozen and several hundred genes.
To know more plasmids visit:
https://brainly.com/question/15461017
#SPJ4
why did the investigators keep the identities of each virus generation a secret from the other researchers developing the phylogenetic tree?
Correct answer option (B) To be sure that only the sequence information was used in the construction of the phylogenetic tree.
A phylogenetic tree is a diagram that represents the evolutionary relationships between organisms.A family tree is a hypothesis, not a definitive fact. Family tree divergence patterns reflect how a species or other group evolved from a set of common ancestors.
A phylogenetic tree is a visual representation of the relationships between different organisms, showing the evolutionary process from a common ancestor to various descendants. Trees can represent relationships ranging from the entire history of life on Earth to individuals within a population.
Phylogenetic analysis provides a deep understanding of how species evolve through genetic change. Phylogeny allows scientists to assess the pathways linking current organisms to their ancestral origins and to predict genetic divergences that may occur in the future.
Complete question:
Why did the investigators keep the identities of each virus generation a secret from the other researchers developing the phylogenetic tree?
A) To preserve the privacy of information coming out of private research labs
B) To be sure that only the sequence information was used in the construction of the phylogenetic tree
C) To create the most challenging set of conditions that would ever be encountered in a phylogenetic analysis
D) To reduce the chances for error by the second set of researchers as they interpreted the sequence information
Learn more about phylogenetic tree from:
https://brainly.com/question/13577065
#SPJ4
Between what temperatures are foods at risk for the growth of bacteria?.
The temperature danger zone is between 41°F and 135°F.
the stimulation of auditory nerves depends on the opening and closing of channels in the auditory hair cells. which type of gating mechanism do these cells use?
The cells use a stress-gated gating mechanism as the stimulation of auditory nerves depends on the opening and closing of channels in the auditory hair cells.
The auditory nerve fibers carry the frequency and strength of the sound stimulus to the brain from the internal hair cells. Cochlear tonotopic in mammals is connected to frequency coding. However, phase blocking at the level of hair cells provides the basis for the coding of sounds with a frequency lower than 3 kHz.
There are cation channels that are mechanically gated in the membrane of stereocilia. The tallest neighboring stereocilium's tip is connected to these cation channels by proteins called tip link proteins. These cation channels open as a result of the basilar membrane's vibration, allowing cations—most notably K+—to enter the cytosol of hair cells. The receptor potential depolarizes when cations enter. Thus, the cells use a stress-gated gating mechanism as the stimulation of auditory nerves depends on the opening and closing of channels in the auditory hair cells.
The complete question is:
The stimulation of auditory nerves depends on the opening and closing of channels in the auditory hair cells. Which type of gating mechanism do these cells use?
(a) voltage-gated
(b) extracellular ligand-gated
(c) intracellular ligand-gated
(d) stress-gated
To learn more about auditory nerve messages please click on the given link: https://brainly.com/question/6237781
#SPJ4
define what mutations and mutagens are, differentiating among the different types of point mutations and their different effects.
A mutagen is a substance that causes DNA alterations (mutations); these substances can harm DNA physically or chemically. An modification to one nucleotide in a chromosomal DNA molecule is known as a point mutation. A base substitution mutation occurs when one base pair in DNA is switched out for another.
A mutagen is an agent, such as radiation or a chemical substance, which causes genetic mutation. A mutation is defined as a permanent alteration of the nucleotide sequence of the genome of an organism, virus, extrachromosomal DNA, or other genetic components.
The primary Difference between a mutation and a mutagen is that while a mutation is an agent that results in a change in the genetic sequence of an organism, a mutagen is the change that occurs naturally. In addition, different factors, such as chemical, physical, or biological agents that can act as mutagens, can be used to categorize mutations.
Learn more about to mutations and mutagens visit here:
https://brainly.com/question/1728110
#SPJ4
The picture below shows you several organs working together, including your lungs, bronchi and windpipe (trachea). This means this picture shows you a __?
system
The image below shows several organs working together, including the lungs, bronchi, and windpipe (trachea). This picture shows the pulmonary system
What is pulmonary system?The upper and lower pulmonary structures, bronchial/systemic circulation, and gas exchange at the level of the lungs and tissue cells make up the pulmonary system. The delivery of oxygen and the elimination of carbon dioxide are the two fundamental objectives that these anatomical components jointly pursue. The nose and pharynx are examples of the higher structures. The pharynx is made up of the laryngopharynx, oropharynx, and nasal cavity. These structures function to filter, humidify, warm, and balance ear pressure in the ambient air. The larynx, trachea, carina, bronchi, bronchioles, and alveoli are among the lower structures. These structures' main function is to transport oxygen to and carbon dioxide away from the alveoli, where gas exchange occurs. Except for the region around the mediastinal space, the whole thoracic cavity is occupied by the lungs. The mediastinal area is home to the heart, major blood veins, bronchi, and esophagus, among other organs. The ventilation and diffusion processes are the two fundamental jobs of the lungs.
• Ventilation: the movement of air between the alveoli and the atmosphere.
• Diffusion: the movement of oxygen and carbon dioxide from a higher concentration to a lower concentration across the respiratory membrane.
To know more about the pulmonary system, visit:
https://brainly.com/question/13210870
#SPJ4
How do you find the domain of a square on a graph?.
By making the square root expression higher than or equal to zero, the domain of the supplied function can be determined. Or to put it another way, x 0 This results in x = 0, which is] , 0]. interpolation notation
Domain and Range of a Function Theorem
A function's domain is the set of all x-values that can exist and still result in the expression f (x).
The set of all possible values that the expression f (x), when x is any number from the function's domain, can take is known as the range of a function. Consider the function f (x) = x as an illustration. If there is a real number y that satisfies the condition y = x, then x = y must be the case. Since we are aware that no actual integer's square is negative, x must not be a negative number. This informs us that the square root function's domain is x 0, which is represented as [ 0, [ in interval notation.
Learn more about interpolation notation using this link:
https://brainly.com/question/26460790
#SPJ4
Which is the correct organization of genetic structures from largest to smallest?.
The correct hierarchy for organising genetic material is genome, chromosome, gene, and nucleotide, from largest to smallest.
Material that includes genetic information and is passed down from one generation to the next is referred to as genetic material. Animal and plant cell nuclei contain threadlike structures called chromosomes, which are made of protein and a single DNA molecule. Genes are DNA sections that give instructions to cells on how to generate proteins; they are the basic structural and functional components of heredity. The monomeric units of the nucleic acid polymers deoxyribonucleic acid and ribonucleic acid are known as nucleotides, which are the building blocks of nucleic acids.
To learn more about nucleotide click here:
https://brainly.com/question/28178584
#SPJ4
What effect does hCG have on the body?.
During pregnancy, the placenta secretes a hormone called human chorionic gonadotropin (hCG). It signals the body to cease menstruating and thickens the uterine lining to assist a developing embryo.
After fertilization, HCG levels increase and stay elevated for around 10 weeks of pregnancy.The hormone known as hCG is in charge of the majority of early pregnancy symptoms. certain symptoms and indications that cause women to wonder if they could be pregnant. These symptoms—breast tenderness, mild emotionality, nausea, and fatigue—are all brought on by high hCG levels.
learn more about hCG here:
https://brainly.com/question/29553240
#SPJ4
a student has two flasks of growing algae. to one flask he adds some phosphorus, while he leaves the other flask alone. he monitors population numbers of the algae daily for three weeks. at the end of this time both populations are stable, but the phosphorus-containing flask has 10 times more algae. which statement is true?
A student has two flasks of growing algae. to one flask he adds some phosphorus, while he leaves the other flask alone. At the end of the day both populations are stable, but the phosphorus-containing flask has 10 times more algae as the phosphorus increased the carrying capacity of the environment.
Too much phosphorus can promote the growth of algae and large aquatic plants, resulting in lower levels of dissolved oxygen- a process known as eutrophication. High phosphorus levels can also cause algae blooms, which can produce algal toxins that are harmful to human and animal health.
Phosphorus (P) is a necessary element for plant and animal growth, as well as for profitable crop and livestock production. It can also boost surface water biological productivity by hastening eutrophication, the natural aging of lakes and streams caused by nutrient enrichment.
Phosphorus, like nitrogen, is an essential nutrient for all life. Phosphate (PO4) is the most common form of phosphorus used by biological organisms, and it is important in the formation of DNA, cellular energy, and cell membranes (and plant cell walls). Commercial fertilizers frequently contain phosphorus.
For more information on Phosphorus, visit :
https://brainly.com/question/1675241
#SPJ4
What happens during unprotected sex?.
Answer:
There are a lot of things that happen.
Explanation:
There can be:
1. Unwanted pregnancy
2. Contacting STIs
all of the following are true regarding nk cells except all of the following are true regarding nk cells except they destroy infected body cells by phagocytosis. they are found in tissues of the lymphatic system. they have the ability to kill infected body cells and some tumor cells. they are a type of lymphocyte. they release toxic substances that cause cell lysis or apoptosis.
All of the given options are true regarding NK cells except- they destroy infected body cells by phagocytosis.
NK cells- It is the primary function of NK (natural killer) cells, which make up 10%–15% of peripheral blood mononuclear cells and have the shape of big, granular lymphocytes, to kill virus-infected and malignantly altered cells without pre-exposure. NK cells take involvement in a variety of immunological responses in vivo, as well as the regulation of hematopoiesis and reproductive processes.
The first line of protection against many viruses is provided by natural killer cells. They are able to identify and kill infected host cells because they can tell them apart from uninfected host cells. By doing this, they can get rid of the infection or at least keep it under control until virus-specific T cells and antibodies can be made.
Therefore, all the given options about NK cells are correct except- they destroy infected body cells by phagocytosis.
To learn more about NK cells refer- https://brainly.com/question/16240473
#SPJ4
the fossil of tiktaalik, which exhibits fins, scales and gills along with a flat head and wristlike forelimb is much like a fish as well as a tetrapod. this type of fossil is an example of a fossil, which supports the idea that animals descended from a common ancestor.
The fossil of tiktaalik is a Traditional fossil.
The idea it supports:The fossil of Tiktaalik resembles both a fish and a tetrapod because it has fins, scales, and gills as well as a flat head and a forelimb that looks like a wrist. Traditional fossils like this one are an illustration that animals shared an ancestor, according to this form of fossil. its significances that is a fish that obfuscates the line between a fish and an animal that lives on land. letting us know that this fish can live in shallow water and even make brief forays ashore and supports the idea that animals descended from a common ancestor.
To know more about fossil of tiktaalik, visit:
https://brainly.com/question/15167693
#SPJ4
For each of the following, indicate whether it would cause an increase in aldosterone secretion, a decrease in aldosterone secretion, or no change in aldosterone secretion. ► View Available Hint(s) Reset Help High plasma potassium levels Dehydration Low plasma sodium levels High plasma sodium levels Low plasma potassium levels Balanced plasma sodium and potassiurn levels No change in aldosterone Decreased aldosterone Increased aldosterone
Increased aldosterone secretion: High plasma potassium levels, Low plasma sodium levels, Dehydration.
Decreased aldosterone secretion: Low plasma potassium levels, High plasma sodium levels
No change in aldosterone secretion: Balanced plasma sodium and potassium levels
What is aldosterone?A steroid hormone made in the adrenal cortex (the outer layer of the adrenal gland). It helps control the water-salt balance in the kidneys by retaining sodium in the body and releasing potassium from the body. Too much aldosterone can cause high blood pressure and fluid accumulation in body tissues.
High aldosterone levels can cause high blood pressure and low potassium levels. Low potassium levels can cause weakness, tingling, muscle spasms, and temporary paralysis. Your doctor will measure the levels of sodium, potassium, and aldosterone in your blood. Low aldosterone levels lead to low sodium levels (hyponatremia), high potassium levels (hyperkalemia), and a condition in which the body produces too much acid (metabolic acidosis).
To know more about aldosterone, visit:
https://brainly.com/question/13971850
#SPJ4
What are 5 examples of genetic factors?.
Most of child's physical characteristics, such as height, weight, body structure, eye color, hair texture, and even intelligence and aptitudes, are influenced by genes.
The pattern of inheritance of certain health problems caused by a combination of genetic and environmental factors is referred to as multifactorial inheritance. Certain risk genes contain variants that do not cause disease but increase the likelihood of symptoms.
Understanding genetic factors and genetic disorders is essential for learning more about health promotion and disease prevention. Some genetic changes have been linked to an increased risk of having a child with a birth defect or developmental disability, as well as developing diseases like cancer or heart disease.
Genes serve as the blueprint for our bodies. A change in a gene disrupts the gene message. Changes in genes can result in a variety of conditions. A changed gene can be inherited, which means it is passed down from parent to child.
To learn more about genetic factors, here
https://brainly.com/question/29517743
#SPJ4
you would like to know whether the progeny of a pair of mated fruit flies are distributed among the resulting four phenotypic classes in a 1:1:1:1 ratio. you perform a chi-square test and obtain a p value of 0.04. assuming you have done the test correctly, select the best interpretation of this result.
It is impossible to explain the differences between the observed and expected counts by chance alone.
What is progeny, for instance?By progeny, we mean "children" or "offspring." Your parents are the progenitors of you and your brothers, and your cat is the progenitor of her most recent litter of kittens. You are also the progeny of your grandparents and great-grandparents because the terms "progeny" and "product" are synonymous terms.
The purpose of the chi square test is to determine the likelihood that the hypothesis is correct. A poor outcome in comparison to the observation indicates the hypothesis is incorrect.
This illustration of the law of independent assortment uses a ratio of 1:1:1:1. The probability of exhibiting is 25%, so the value of p 0.04 is very low.
As a result, the discrepancy between the observed and expected count is too great to be due to chance.
To know more about progeny visit:
https://brainly.com/question/14801475
#SPJ4
Which of the following phenomena is not an evolutionary mechanism? A. Gene flowB. Natural selectionC. MutationD. Genetic driftE. Random mating
Random mating is a phenomenon that is not an evolutionary mechanism
Evolution is a term that describes how an organism evolved from another form that is different from its current form.Of the options given, random mating is not an evolutionary mechanism.
Take people for example. Humans were thought to have evolved into humans (through several evolutionary steps) from Australopithecus.
There are several mechanisms that contribute to evolution. Mutation, non-random mating, gene flow, finite population size (genetic drift), natural selection, etc.
Mutations are the original cause of all genetic variation, but mutation rates in most organisms are rather low. Therefore, the impact of novel mutations on allele frequencies from one generation to the next is usually not large.
Non-random mating. In non-random mating, organisms may prefer to mate with other organisms of the same genotype or different genotypes.
Gene flow involves the transfer of genes to and from populations by either individual organisms or their gametes (egg and sperm, e.g. by pollen dispersal through plants).
Population size is not infinite (genetic drift). Genetic drift includes changes in allele frequencies due to random events. This is literally a "sampling error" when selecting next-generation alleles. Drift can occur in populations of any non-infinite size, but affects small populations. natural choice. Finally the most famous evolutionary mechanism! Natural selection occurs when alleles (or combinations of alleles from different genes) make an organism more or less compatible, that is, allow it to survive and reproduce in a particular environment.
Therefore, random mating is not an evolutionary mechanism.
For more information on Evolution, see:
Brainly.com/question/2725702
#SPJ4
2. the normal human microbiota a.infants in the first years of life are often more susceptible to certain bacterial infectionsthan older children. how can you explain this? what function of the microbiota does thisillustrate?
The gut microbiota of neonates is less diverse than that of adults, which weakens the infant's immunity and makes them more susceptible to certain bacterial infections.
What is Microbiome?The human body is home to millions of microbes that work synergistically with our own cells to affect our health throughout our lives and potentially across generations. Microorganisms, called "microbiota" (organisms) or "microbiomes" (organisms and their collective genetic makeup), exert their actions by influencing immunological, endocrine, and neurological pathways. A variety of microbes thrive in the skin, oral cavity, and genitourinary tract, but the gut microbes are the most diverse and abundant, and their functions are best understood.
From birth, the gut microbiome has three main roles: Protection, metabolism, nutrition. Gut microbes act as a barrier against the growth of pathogens.
To know more about Microbiome, visit:
https://brainly.com/question/28436387
#SPJ4
Compared with DNA replication, transcription is _______ error prone because of differences in _______.
A) more; excision repair
B) more; the number of copies made
C) less; the proofreading system
D) less; the number of copies made
E) more; the proofreading system
Compared with the DNA replication, transcription is more error prone because of differences in the proofreading system. Thus, the correct option is E.
What is Transcription?Transcription is the process which occurs in the nucleus of the cell. During this process, the synthesis of mRNA (messenger RNA) from DNA takes place. This mRNA then leads to the formation of protein.
The most common type of error in transcription is a (C to U) base substitution and transitions that occur more frequently than transversion events, as found in case of spontaneous mutation. Therefore RNA polymerase base mis-incorporations appear to resemble DNA polymerase base mis-incorporations.
Therefore, the correct option is E.
Learn more about Transcription here:
https://brainly.com/question/14136689
#SPJ1
Select all of the following reasons why the rooting powder stimulated root growth.
1 The powder sent chemical signals to initiate cell division.
2 It sent chemical signals promoting cells to differentiate.
3 It provided extra nutrition to the branches during growth.
4 It sent chemical signals telling cells to shrink.
5 The powder provided extra water to cells.
Hormone rooting powders and gels use synthetic auxins to simulate plant growth and promote root formation. Therefore, option (1) and (2) are correct.
Why does rooting powder stimulate root growth?Rooting hormone, often known as rooting powder, is a chemical that can be applied to plant cuttings in order to stimulate the growth of roots and improve the chances of successfully propagating the plant.
Every single plant possesses hormones, one of which is called auxin, also known as the growth hormone. Auxin is created in the immature regions of the plant, which is where growth is required. In order to simulate the effects of natural growing circumstances on plants and to stimulate the development of roots, hormone rooting powders and gels make use of synthetic auxins.
Therefore, rooting powder send signals to promote cell division and differentiation.
Learn more about rooting powder, here:
https://brainly.com/question/24391294
#SPJ1
