Answer:
probably natural selection but it could also be discontinous variation.
Explanation:
depends on what context is??
Why is it important that scientists haven't identified a lokiarchaeote cell yet
Well, scientists are working hard to find out more about cells, so they should know all of the cells. The Lokiarchaeote cell is one of the only ones they have yet to find out stuff about. Scientists also need to know about it, because it is a part of our bodies, and maybe sometimes they can cause infection in the body. Scientists need to know if it could lead to some of the biggest infections ever.
What happens to the embryos as they journey along the conveyor belt? in brave new world
Decantation is the process of preparing embryos for the future. They receive vaccinations and immunizations against all diseases, and each embryo's caste is determined by the addition or exclusion of chemicals. Individuals are perfectly equipped for their state-determined fate once they have been decanted.
How are babies made in Brave New World?In Brave New World, artificial reproduction is used to build a "perfect" society. In a facility called "The Central London Hatching and Conditioning Center," babies are born in bottles. Once "hatched," the kids are brainwashed to accept certain moral principles that the book refers to as "hypnopedia."
The notion that society's well-being comes before an individual's is also instilled in the minds of the young. The youngsters are also told that they were made to accomplish their task and that there would be consequences if they did not do it, which goes along with this idea. Each child is placed into a specific container in order to have even more control over the children being created in the bottle. Each faction has a function within the civilization and is unable to deviate from that function.
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Which component of amino acids accounts for the differences in their properties?
The Alkyl group (R) is a component of amino acids accounts for the differences in their properties.
An amino acid contains an Amino group, Carboxyl group, H atom and an Alkyl group. Amino group, Carboxyl group and H atom are common for all amino acids. Alkyl group(R) is unique for every Amino acid. It differs from an amino acid to other amino acid.
This provides unique property to every protein structure as well since amino acids make a polymer of proteins. The alkyl group in amino acid can be Carbon containing, Ring containing, Amino group or a carboxyl group as well.
If an amino group is added in place of an alkyl group or with an alkyl group then the amino acid becomes basic in nature.
Similarly, if carboxyl group added in place of an alkyl group or with an alkyl group then the amino acid becomes acidic in nature.
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What type of anemia is caused by defective red blood cells with a shortened life span?
The name of the anemia is Hemolytic anemia which is caused by defective red blood cells.
It is simply a disorder in which red blood cells are more quickly destroyed as compared to what can be generated. The number of red blood cells decreases is called hemolysis.
It is also caused due to some infections in the body. As we know red blood cells carry oxygen and if the body has fewer number cells then proper oxygen is not carried out to the tissues and organs of the body.
If your body does not have proper oxygen, the body can't function properly. Oxygen is very important for us to function properly. Without oxygen, human life is impossible.
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What is the difference between colonial and multicellular organisms?
Answer:
the individual organisms that form a colony or biofilm can, if separated, survive on their own, while cells from a multicellular organism (e.g., liver cells) cannot.
Determine if the following statement is true or false, and why. "All mutations are harmful and increase the risk of diseases
such as cancer."
A. True
B. False, it should read "Some mutations may be harmful and increase the risk of diseases such as cancer, but many are beneficial"
C. False, it should read "All mutations are beneficial"
D. False, it should read "Some mutations may be beneficial, but many are harmful and increase the risk of diseases such as cancer."
A mutation is a change in the DNA sequence that can be either beneficial or harmful. 1) B, false.
What is a mutation?A mutation is a stable and hereditably change in the genetic material that introduces new variants.
These changes are unpredictable, and occur due to the action of mutagenic agents that alter DNI sequences.
Different mutagenic agents cause changes in genetic information, increasing mutations over the normal level.
Mutagenic agents cause changes in the base sequences and pairing.
Many of these mutations are eliminated, but some might succeed and be incorporated into each individual, getting to even affect the entire species.
These mutations are the ones that have been selected by natural selection.
Mutations depend on environmental conditions and ecological pressures, and accumulate in time. Mutations can be damaging or beneficial to the organism and might be inheritable or not.
Those favored by natural selection are inherited by the following generations and get to spread.
The statement is False, Option B.
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Answer: False, it should read "Some mutations may be harmful and increase the risk of diseases such as cancer, but many are beneficial"
Explanation: Not all mutations are harmful because some are useful and help many
Administration of testosterone should lead to male mating behavior in an animal only if...
Choices:
The requisite sexually dimorphic nuclei are sufficiently masculinized
There are high levels of estrogen in the brain
There are low levels of estrogen in the brain
The requisite sexually dimorphic nuclei are sufficiently defeminized
Administration of testosterone should lead to male mating behavior in an animal only if The requisite sexually dimorphic nuclei are sufficiently masculinized.
The main sex hormone and anabolic steroid in guys is testosterone. In humans, testosterone is essential for the growth of the testes and prostate, as well as for the promotion of secondary sexual traits including increased bone and muscle mass and the development of body hair. Through territorial aggression, wooing rituals, and mate-guarding behavior, high testosterone levels have been found to improve mating effort.
The preoptic area of the hypothalamus, where the sexually dimorphic nucleus -POA is situated, regulates male sexual behavior. Snake, reptile, avian, rodent, ungulate, and primate male-typical copulatory activity is reduced by large lesions in the preoptic region.
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Which lobe of the brain is associated with personality and intellectual functioning?
The alternative pathway of complement cascade activation begins with ________ binding to the surface of a microbe. c5b c5a c3b c1 factor b
The correct answer is c3b.
The intrinsic C3 thioester bond of the alternative pathway (AP) is progressively hydrolyzed spontaneously by diverse proteins, lipids, and carbohydrate structures on microbes and other external surfaces [12–14], and this further activates the AP [1, 15]. A blue line pointing to C3 denotes the fluid-phase C3b promoting assembly of AP C3 convertase as the proposed mechanism for the reaction of properdin with a target on the foreign surface [27]. Thick red lines signify amplification mechanisms: Factor H regulates and inhibits the tick-over reaction, a gradual spontaneous activation involving C3(H2O) reacting with factor B. Properdin also promotes self-amplification in the other loop by stabilizing the C3bBb complex.
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In __________ organisms, the primary function of a gene in a cell is to participate in regulating the body as a whole and not to responding to the cell's immediate environment. group of answer choices
In Multicellular organisms, the primary function of a gene in a cell is to participate in regulating the body as a whole and not to responding to the cell's immediate environment. group of answer choices.
Multicellular organisms are composed of more than one cell, with groups of cells differentiating to take on specialized functions. Gene expression in eukaryotic cells is regulated by repressors as well as by transcriptional activators. Like their prokaryotic counterparts, eukaryotic repressors bind to specific DNA sequences and inhibit transcription. Gene expression is primarily controlled at the level of transcription, largely as a result of binding of proteins to specific sites on DNA.
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HELP! 30 points plus BRAINLIEST
Which one of the following methods is most effective in protecting the environment?
A) Finding new locations to store wastes where they are less likely to harm organisms.
B) Physically removing wastes that are in the environment.
C) Recycling materials so that fewer resources are used and less trash is produced.
D) Reducing the amount of materials used without recycling.
Answer:
you better give me brainliest
Explanation:
Recycling materials so that fewer resources are used and less trash is produced
put simple a b or c its not that hard
The correct answer choice from the statement above is:
Homeostasis is the the maintenance of a steady internal environment of an organisms.
Option B is the correct answer
What are hormones?Hormones are chemical messengers or substances which are produced by the endocrine glands and released to the sites of action where they are needed.
Below are few examples of some hormones which also help in homeostasis:
AdrenalineAldosteroneAntidiuretic hormoneAdrenocorticotropic hormoneOxytocinInsulinGlucagonTestosteroneOestrogenSo therefore, the correct answer choice from the statement above is:
Homeostasis is the the maintenance of a steady internal environment of an organisms
Complete question:
Which of the following statements best describes homeostasis. Simply put a b or c its not that hard
a. Homeostasis is regulation of external environment
b. Homeostasis is the maintenance of a steady international environment of an organisms
c. Homeostasis is movement of molecules from a region of higher concentration to a region of lower concentration
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The inferior lateral walls and part of the floor of the cranium are formed by the?
The ethmoid bone shapes the floor of the skull as well as its inferior lateral walls.
Where is an ethmoid bone found?
The upper nasal cavity's roof and lateral walls, the top part of the nostril septum, and a piece of the orbit's medial wall are all formed by the ethmoid bone, a single midline bone. The ethmoid also contributes to the anterior cranial cavity's floor on the inside of the skull.
The anterior cranial fossa's floor is formed by the ethmoid bone, which occupies a tiny space in the cranial cavity near the midline. This area also serves as the nasal cavity's slender roof. The cribriform plates and crista galli make up this section of the ethmoid bone.
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Please Help!! URGENT! 5. Charles Darwin observed many species of finches in the Galápagos Islands. This area is made up of many small islands separated by ocean water. Each island has slightly different geography and food sources.
a) Name three reasons that this area had a high rate of speciation
b) How would the rate of speciation be different if the islands were much closer together? Explain
Isolation, Divergence and Reproductive isolation are the three reasons of higher rate of speciation.
What are the three reasons that this area had a high rate of speciation?Isolation, Divergence and Reproductive isolation are the three reasons that this area had a high rate of speciation. Isolation of populations is the main reason of speciation. Divergence in traits of separated populations have different mating system or habitat. Reproductive isolation of populations causes the populations come into contact again and again.
How would the rate of speciation be different if the islands were much closer together?
The rate of speciation would be different if the islands were much closer together because the species can easily move from one island to another island which leads to diversification of population.
So we can conclude that Isolation, Divergence and Reproductive isolation are the three reasons of higher rate of speciation.
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It would be most difficult for the body to maintain homeostasis if over several days someone had an inadequate intake of:________
If someone had an inadequate intake of sodium over several days, it would be most difficult for the body to maintain homeostasis.
Why is sodium important for homeostasis?Most of the sodium in our body is present in the extracellular fluid (ECF). The concentration of sodium in the body is measured relative to the amount of water in the body.
Maintaining proper sodium concentration is therefore essential for maintaining water balance in the body. It also helps in the proper functioning of neurons by assisting in the conduction of impulses.
Sodium concentration is also important for muscle contraction. Proper sodium concentration maintains osmolality of the extracellular fluid which maintains the volume of blood and plasma in the body.
Therefore, an inadequate intake of sodium, over several days will affect the homeostasis of the body.
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If a 0. 2-ml blood sample with a paco2 of 40 mm hg diffuses across a membrane into the e2 electrode containing 0. 3 ml of solution, the final paco2 in the blood sample will be::________
If a 0. 2-ml blood sample with a paco2 of 40 mm hg diffuses across a membrane into the e2 electrode containing 0. 3 ml of solution, the final paco2 in the blood sample will be less than 16 mm Hg.
What is paco2?
The partial pressure of carbon dioxide is specifically evaluates the carbon dioxide level in blood.
It is a determined by using a popular test called arterial blood gases (ABG) test.
It also also evaluates the partial pressure of oxygen (PaO2), bicarbonate (HCO3), and pH level of blood.
This test is performed on patients of lung diseases, neuromuscular diseases and also useful for getting a clear picture of the body's metabolic and respiratory conditions.
Hence the answer is less than 16 mm Hg.
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By which proposed molecular mechanism does ca2 promote fusion of synaptic vesicles?
Through binding and inducing changes in synaptotagmin which causes the plasma membrane to curve, thus, facilitating fusion.
Ca2+ triggers synaptic vesicle exocytosis, therefore, releasing the neurotransmitters contained in the vesicles and initiating synaptic transmission. Synaptotagmin (syt) is a Ca2+ sensor which can induce fast and synchronous neurotransmitter release.
Synaptic transmission amidst pre- and post-synaptic neurons occurs when the pre-synaptic neuron terminal is temporarily depolarized upon an action potential, thereby, opening Ca2+ channels near the active zones of synapses. Ca2+ flows into the cytoplasm as the extracellular Ca2+ concentration is much higher than the cytoplasmic concentration . Successively, Ca2+ triggers fusion of neurotransmitter-filled synaptic vesicles with the presynaptic membrane in less than a millisecond.
Neurotransmitter molecules are released into the synaptic cleft upon fusion, which then bind to the receptors located in the postsynaptic membrane.
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In a classic experiment conducted by Cannon and Washburn (1912), they monitored stomach contractions and found them to be related to _____.
In a classic experiment conducted by Cannon and Washburn (1912), they monitored stomach contractions and found them to be related to hunger.
What is stomach contraction?Stomach, intestines, or abdominal muscles can constrict during a stomach spasm. It may feel like a tiny muscle twitch or stomach cramps, depending on which area of your body is spasming and how severely.Food is moved through the digestive tract by a sequence of wave-like muscle contractions called peristalsis. The process begins in the esophagus, where powerful waves of smooth muscle transport balls of swallowed food to the stomach.Primarily, hunger is a biologically induced urge for food, which is necessary for survival. So, it is possible to think of hunger as a biological characteristic of humans that can be measured and predicted in terms of appetite and food consumption.Nerve cells located in the hypothalamus are what cause the feeling of hunger when they are active.
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__________________________ is a hybrid of pure and applied science. academic research technoscience industrial research biotechnology
Technoscience is a hybrid of pure and applied science. academic research technoscience industrial research biotechnology.
Belgian philosopher Gilbert Hottois first used the term "technoscience" in the late 1970s. Sociologist Bruno Latour has used it to investigate the role of scientists and engineers in society as well as the relationship between technology and people.The term "technoscience" describes the close ties that exist in modern scientific research and development (R&D) between fields that were once thought to be fundamentally distinct from one another: technology and science. This distinction was made by philosophers. The degree of the relationship between science and technology as well as the focus on technology that the term techno(-)science places on it varies.Additionally, the majority of scientists and philosophers of science still view technology as applications and results of scientific advancement. Nevertheless, they acknowledge that technology's effectiveness and success help science to be realistic, objective, and universal.learn more about technoscience here: https://brainly.com/question/5043267
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Which enzyme will be most involved in the digestion of high protein food?
a. salivary amylase
b. pancreatic looses
c. protease
d. sucrase
Answer:
a. salivary amylase
Explanation:
salivary amylase breaks down starches (complex carbohydrates) into sugars for the body to absorb more efficiently.
The segment of the the lymphatic pathway called the lymphatic vessels are most anatomically similar to which type of blood vessel?
The segment of the lymphatic pathway called the lymphatic vessels is most anatomically similar to the Cardiovascular vein.
The lymphatic vessels are similar to the cardiovascular veins.
The direction of transport of fluid:-Lymphatic vessels transport lymph from the tissues to the collecting ducts. This is the same function vein that transports blood from tissues to the heart. Pressure:-Lymphatic vessels work under low pressure as veins do.Valves:- Both lymphatics vessels and cardiovascular veins have a series of valves inside them that maintain the fluidity of lymph and blood throughout the pathway respectively.What is the lymphatic system?
The lymphatics system is the part of our immune system which consists of networks of vessels. These vessels carried out lymph from the tissue which has leaked out from the blood vessels. These lymphatic vessels and tissues work together to take back this lymph into the bloodstream.
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Once habituation occurs, a new stimulus causes responsiveness to return to a high level, an increase called?
Once habituation occurs, a new stimulus causes responsiveness to return to a high level. This increase is called recovery.
Habituation is one of the simplest and commonly chosen forms of learning. It lets people tune out unnecessary stimuli and focus on the things that matter. Habituation is something that is happening on a daily basis at the time of any kind of learning but the person is usually unaware of it.
For example, if you are studying mathematics with music on it may feel distracting in the beginning, but habituation lets you tune out the noise and focus on what you are trying to learn.
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The portions of the mature mrna where rna-binding proteins can attach in order to change rna stability are known as?
Plant cells placed in HYPOTONIC
conditions will remain
A. turgid
C. plasmolyzed
B. wilted
D. flaccid
Answer:
option no. C. is the correct answer.
1. write down a brief summary of the main steps you took in the procedure and what the purpose of each step was. be sure to include any adjustments you may have made to the procedure, what they were, and why you made them.
It is important to consider that some pollutants are taken up easily by plants whereas other pollutants are difficult. This is because of their water solubility criteria. If a pollutant can be taken up by plant directly, it can cause more damages to the plant as compared to the pollutant which interacts from outside.
What is Pollutants?Pollutants can affect the photosynthesis:Some pollutants are toxic to plant metabolic reactions such as photosynthesis. This is because of their oxidative nature that can damage the photosystems. This ultimately impairs the plant functioning, e.g. ozone in the air.
Pollutants can affect the plant-associated microbial communities:Some pollutants such as antibiotics can target plant-associated bacterial communities that are required for plant health. Just like the human gut, plants also have beneficial bacteria that live inside the plant tissues. These bacteria are called endophytes. The harmful nature of the compounds can affect those bacteria which decreases plant fitness.
Pollutants can compete with nutrients that act as limiting factors:Some pollutants are hydrophobic in nature and make the beneficial nutrients less available to the plants. Likewise, some pollutants reduce the bioavailability of plant necessary nutrients directly. This results in reduced growth and development in plants.
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The facial nerve (cn vii) passes through the opening in the temporal bone called the?
The facial nerve (cn vii) passes through the opening in the temporal bone called the stylomastoid foramen.
Stylomastoid foramen:The foramen between the styloid and mastoid processes of the temporal bone of the skull is known as the stylomastoid foramen. It serves as the facial canal's terminus and carries the facial nerve and stylomastoid artery. Bell's palsy may be brought on by facial nerve irritation in the stylomastoid foramen. An unexplained episode of facial muscular paralysis or weakening is known as Bell's palsy. Over the course of 48 hours, it gets worse suddenly.
The stylomastoid foramen is where the 7th cranial nerve leaves the skull and enters the parotid gland at its deep surface. The nerve splits into two major branches, the temporofacial branch, and the cervicofacial branch, right next to the parotid duct.
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Muscle tone and strength usually begin to show signs of decline around the age of _____
When the resident microbiota prevents the establishment of a pathogen, it is called _______.
Microbial antagonism is the inhibition of pathogens growth by antagonist microbiota. When the resident microbiota prevents the establishment of a pathogen, it is called Microbial antagonism.
What are antagonist microbiota?
Antagonist microbiota are the organisms, like bacteria or fungi, capable of acting as a biological control to avoid other pathogenic agents' establishment.
These organisms share three characteristics,
a) capability to quickly colonize a new surface and effectively persist on it
b) better ability than the pathogen to get nutrients
c) the capability of surviving under different environmental conditions.
These antagonists are
genetically stable, their nutritious requirements are not demanding, they are capable of surviving under adverse environmental conditions, they have a high reproductive capability, and are not pathogenic to their host.
The mechanisms these antagonists use to inhibit the pathogen growth and establishment are among others, antibiosis, competition for resources, lytic enzyme production, and parasitism.
When the resident microbiota prevents the establishment of a pathogen, it is called _microbial antagonism_.
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What hormone causes the endometrial glands to fill with glycogen and endometrial blood vessels to become more numerous?
What hormone causes the endometrial glands to fill with glycogen and endometrial blood vessels to become more numerous? Progesterone
What is endometrial glands?Endometrial glands, also known as uterine glands, are tubular glands that are present in the functional layer of the endometrium that borders the uterus. They are lined with ciliated columnar epithelium. Throughout the menstrual cycle, their appearance changes. Because of the ovaries' release of estrogen during the proliferative period, the uterine glands seem to be lengthy. The uterine glands produce a glycogen-rich secretion and become very coiled throughout the secretory phase. As a result of increased progesterone release from the corpus luteum, this alteration is correlated with an increase in blood flow to spiral arteries. Progesterone release declines during the premenstrual phase as the corpus luteum deteriorates, which lowers blood supply to the spiral arteries. During the process of menopause, the uterus' functional layer—which houses the glands—becomes necrotic and eventually sloughs off.
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A food contains 1.1 grams carbohydrates, 13 grams protein, and 11 grams fats. how many calories does the food provide?
