Blood in the fetus is oxygenated in the placenta rather than in the lungs. The umbilical arteries connect the fetus to the placenta.
Fetal breathing occurs 10%-20% of the time during 24-28 weeks of gestation, rising to 30%-40% after 30 weeks. Fetal respiration, which originates in the diaphragm, is irregular in frequency and amplitude and fluctuates during pregnancy. The volume of fluid transported is minimal, and it is inadequate to empty the trachea.
Foetal breathing motions are apparent in humans beginning in the fifteenth week of pregnancy and increasing until the beginning of the third trimester. Breathing motions have been present 30% of the time throughout the previous 10 weeks. Fetal breathing movements (FBM) are critical in lung development because they delay the drainage of fluids from the future airspaces of the lungs, allowing for proper lung expansion.
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Why was the spontaneous formation of membranes such an important step in cell evolution?
a. With the spontaneous formation of membranes, a membrane can enclose a solution that is different in composition from its surroundings.
b. If that solution included self-replicating molecules such as RNA and a beneficial assortment of other molecules, these combinations could be passed on to daughter cells as new membrane-enclosed vesicles budded off. c. A membrane that not only encloses a successful assembly of molecules but also regulates chemical exchanges with the environment is a basic requirement for life.
The spontaneous formation of membranes allowed for the creation of microenvironments that allowed for the preservation and replication of successful combinations of molecules. It also enabled the regulation of chemical exchanges with the environment, which is a basic requirement for life. These developments laid the foundation for the evolution of the first living organisms. So all the option is correct.
The spontaneous formation of membranes is considered a major step in the evolution of cells because it paved the way for the development of the first living organisms. Here's why:
a. Enclosure of a solution with a different composition: The spontaneous formation of membranes allowed for the creation of a barrier around a solution that was different in composition from its surroundings. This enabled the creation of microenvironments that allowed certain chemical reactions to occur that would not have been possible in the outside environment.
b. Self-replicating molecules: If the solution inside the membrane included self-replicating molecules, such as RNA, and a beneficial assortment of other molecules, these combinations could be passed on to daughter cells as new membrane-enclosed vesicles budded off. This was the beginning of reproduction, which is a hallmark of life.
c. Regulation of chemical exchanges: A membrane that not only encloses a successful assembly of molecules but also regulates chemical exchanges with the environment is a basic requirement for life. The formation of membranes enabled the regulation of the exchange of materials between the cell and its surroundings, which is essential for maintaining homeostasis, supporting metabolism, and allowing cells to grow and reproduce.
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iii) suggest how the actual genotype of the albino parent could be determined.
Cross the albino parent with a black individual aaDd/aaDD (homozygous for yellow banding)
If genotype is Aadd, there will be agouti offspringIf genotype is aadd no offspring produced with be agouti.The transmission of features or information from one generation of persons or cells to the next is referred to as inheritance. Inheritance can occur through one of two mechanisms: genetic inheritance or epigenetic inheritance. Part of the molecular underpinning of inheritance is the study of genes, genetic variations, and heredity. It explains why a child resembles his or her parents. The molecular basis of heredity is built on DNA, RNA, and genetic code. They pass down genetic genes from parents to kids.
For single-gene illnesses, there are four primary patterns of inheritance: autosomal dominant, autosomal recessive, X-linked dominant, and X-linked recessive. However, these patterns do not apply to all genetic disorders, and other uncommon kinds of inheritance, such as mitochondrial inheritance, exist.
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in the absence of oxygen, yeast cells can obtain energy by fermentation, resulting in the production of a. atp, , and lactate. b. atp, pyruvate, and acetyl coa. c. atp, pyruvate, and oxygen. d. atp, nadh, and pyruvate. e. atp, , and ethanol (ethyl alcohol).
The correct answer is option e. In the absence of oxygen, yeast cells can obtain energy by fermentation, resulting in the production of atp, and ethanol (ethyl alcohol).
In the absence of oxygen, yeast cells rely on fermentation to gain energy. During fermentation, glucose molecules are broken down into smaller molecules such as pyruvate, which are metabolized to produce energy. This energy is stored in the form of ATP, NADH, and other molecules. The end product of fermentation is ethanol (ethyl alcohol).
The production of ethanol and other byproducts provides the cell with energy, which is then used in cellular processes. The overall process of fermentation is anaerobic, meaning it does not require oxygen. Therefore, in the absence of oxygen, yeast cells can obtain energy by producing ATP, NADH, and ethanol.
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which is the most accurate statement with regard to the cdc's category abc agents list?
The CDC's Category ABC Agents list is the most comprehensive and over- to- date table of contagious agents and conditions that are of implicit concern in the United States.
The list is divided into three orders A agents are those that pose the topmost implicit trouble to public health and safety; B agents are those that pose a moderate implicit trouble; and C agents are those that pose the least implicit trouble. The list is streamlined regularly to include new contagious agents or conditions that may pose a trouble.
It's important to note that the list doesn't include every contagious agent and complaint; rather, it focuses on those that are most likely to beget serious illness or death. The list is collected grounded on the stylish available scientific substantiation and is used by public health professionals to prioritize their response to implicit outbreaks.
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3. If a species of bird flies fast to escape predators, then over time (many, many generations) the wing muscles of that species will get stronger so that it can fly faster. How does this happen?
A. Birds born with stronger wing muscles survive longer and pass down that trait to their offspring.
B. The more a bird flies, the stronger it gets and passes down that trait to its offspring.
C. The more a bird flies, the more fatigued it gets, and it passes down that trait to its offspring.
D. Birds born with weaker wing muscles survive longer and pass down that trait to their offspring.
Explain why convection can only take place in fluid but not in solids.
Convection cannot occur in solids because for convection to occur, a substance's molecules must be free to move, as they are in liquids and gases. A solid's molecules are closely packed, making it challenging for molecules to move about and allow convection to occur.
Why is convection restricted to fluids?Convection only occurs in fluids, such as gases and liquids. Because molecules within liquids and gases are free to move, this occurs. The difference in temperature between the two fluid components allows the heat energy to be transported by convection.
Why may only gases or liquids experience convection currents, not solids?Since molecules in solids are closely bonded to one another, they can vibrate but cannot move to transfer heat from one area to another. Convection currents are therefore only visible in liquids and gases and not in solids.
Why are gases not capable of convection?beloved in our neighborhood. Because of how closely packed the molecules are in solids compared to how weak the molecular force is in liquids and gases, convection is only conceivable in these media.
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provide an example of founder effect
Answer:
For example, If a bird population migrates to an island that has cold weather they will evolve more fur.
Answer:
In humans, founder effects can arise from cultural isolation, and inevitably, endogamy. For example, the Amish populations in the United States exhibit founder effects because they have grown from very few founders, have not recruited newcomers, and tend to marry within the community.
Which of the following effects would be brought about by any enzyme catalyzing the simple reaction:
S K1----> P where Keq =[P]/[S
k2<-----
A) Decreased K’eq
B) Increase k1
C) Increase ∆G‡
D) More negative ∆G’°
E) Increased k2
F) Decreased ∆G‡
G) Increased Keq
Why? Justify your answer to every letter using your knowledge of enzyme action and activity
Answer:
A) Decreased K’eq - This is not correct. Enzymes lower the activation energy required for a reaction to occur, which leads to an increase in the rate of the reaction (k1) and a decrease in the equilibrium constant (Keq)
B) Increase k1 - This is correct. Enzymes lower the activation energy required for a reaction to occur, leading to an increase in the rate of the reaction (k1).
C) Increase ∆G‡ - This is not correct. Enzymes lower the activation energy required for a reaction to occur, which leads to a decrease in the standard free energy change (∆G‡)
D) More negative ∆G’° - This is not correct. Enzymes lower the activation energy required for a reaction to occur, which leads to a decrease in the standard free energy change (∆G‡) and as a result, ∆G'° will become less negative.
E) Increased k2 - This is not correct. Enzymes do not affect the rate constant for the reverse reaction (k2)
F) Decreased ∆G‡ - This is correct. Enzymes lower the activation energy required for a reaction to occur, which leads to a decrease in the standard free energy change (∆G‡)
G) Increased Keq - This is not correct. Enzymes lower the activation energy required for a reaction to occur, which leads to a decrease in the equilibrium constant (Keq)
In summary, enzymes catalyze reactions by lowering the activation energy required for a reaction to occur, leading to an increase in the rate of the reaction (k1) and a decrease in the standard free energy change (∆G‡) and equilibrium constant (Keq).
The enzyme that is catalysing the straightforward reaction has a lowered activation energy, increased k1, and increased k2.
Enzymes don't alter a biological reaction's equilibrium state, to put it briefly. G0 and Keq do not change. Instead, the enzyme speeds up the reaction by lowering the activation energy required for it to happen.
A catalyst accelerates the forward and backward reactions by the same precise amount. When the rates of the forward and back reactions are identical, dynamic equilibrium is reached. There is no requirement for a change in the position of equilibrium if a catalyst speeds up both reactions equally.
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A portion of sequences for two types of hemoglobin are shown in the diagram.
The top sequence for wild-type hemoglobin is C-C-T, G-A-G, G-A-G. The bottom sequence for sickle-cell hemoglobin is C-C-T, G-T-G, G-A-G.
Sickle-cell anemia is caused by a mutation of one nucleotide in a gene. Using the diagram, which type of mutation is responsible for sickle-cell anemia?
A.
a frameshift mutation
B.
an insertion mutation
C.
an inversion mutation
D.
a substitution mutation
Answer:
D.
Explanation:
Sickle-cell anemia is caused by a point mutation, specifically a single nucleotide substitution, which is the replacement of one nucleotide in the DNA sequence with another. In the diagram provided, the wild-type hemoglobin sequence is shown as C-C-T, G-A-G, G-A-G and the sickle-cell hemoglobin sequence is shown as C-C-T, G-T-G, G-A-G. The difference between these two sequences is that the wild-type has an adenine (A) at the second position of the second codon (GAG) while the sickle-cell hemoglobin has a thymine (T) at the same position. This single nucleotide change in the DNA sequence results in a change in the amino acid sequence of the hemoglobin protein, and this is what causes the abnormal sickle-shaped red blood cells.
if these parents (xmlxml xmly) -have a male offspring, what is the probability that he will be color blind? -have a female offspring, what is the probability that she will be color blind
Male offspring, the probability that he will be color blind is 50%. female offspring, the probability that she will be color blind is 50%.
A genetic condition known as color blindness is linked to the X-linked chromosome. Only if the male parent is color blind and the female parent is a carrier or color blind will the female child be affected. Red-green color blindness known as protanopia is brought on by recessive genes. It happens when the L-cone is completely gone and the person can't even see the colors red and green.
Protanopia is caused by this recessive condition's XM- allele.
Parents genotype: XM- XML x XM-Y
The genotype of male offspring: XM-Y, XMLY
The genotype of female offspring: XM-XM-, XMLXM-
Colorblind female offspring is 50 % (XM-XM-)
Colorblind male offspring is 50% ( XM-Y,)
The correct option is: 50 % female and 50% male
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(Complete question)
What is the probability that parents with the following genotypes have a colorblind male? A color blind female? XM-XML XM-Y 096 females, 50% males 100% will be colorblind 50% females, 50% males 50% females, 100% males
Why are the differences in the shape of a plant cell and an animal cell necessary for their functions?
Answer:
Explanation:
plants it has definite shape while animals have concrete shape
within which structure in the human body does specialization of parts of developing baby take place ?
Answer:
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one primitive trait of ardipithecus ramidus is its group of answer choices opposable big toe pelvis. hip. flat face.
The Opposable toe is one of Ardipithecus ramidus' primordial characteristics.
A species of hominid known as Ardipithecus ramidus lived in the early Pliocene about 4.5 million years ago. The grasping or opposable big toe of Ardipithecus ramidus, which is specialized for mobility in trees, is a primordial characteristic of this species. The characteristics referred described as "primitive qualities" come from remote ancestors.
Humans and other primates have opposable thumbs. Additionally, several primates have opposable large toes that can be used similarly to an opposable thumb. Humans are the only primates without an opposable big toe. For movement in trees, where they can utilize it to hold trees while climbing, opposable big toes were developed. All previously known hominins lacked an opposable big toe, but Ardipithecus ramidus did.
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4. When discussing comparative morphology, what do scientists compare between modern organisms and their extinct relatives?
timeline
DNA
anatomy
environment
epithelial cells of the proximal tubule have extensive microvilli to provide for a larger surface area on the apical membrane. sometimes the microvilli on the epithelial cells lining the proximal tubule are destroyed. what effect would this have?
Reabsorption of salts and nutrients from the proximal tubule would decrease.
Through the actions of its proximal and distal tubular portions of nephrons, the kidney plays a crucial part in sustaining bodily fluid and salt balance as well as blood pressure regulation. The fact that proximal tubules play a more significant function than their distal counterparts is widely acknowledged. The majority, if not all, of the filtered amino acids, glucose, solutes, and low molecular weight proteins are reabsorbed in the proximal tubules, which are also responsible for around 65% of the filtered load. By reabsorbing over 80% of filtered bicarbonate, proximal tubules also play a significant part in controlling the acid-base balance.
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congenital analgesia is a rare recessive trait. what is the likelihood that the first two offspring of a cross between two unaffected parents heterozygous for the trait will have congenital analgesia and that the third offspring will be unaffected?
The probability that the first two offspring of the cross will have congenital analgesia is 6.25%.
In an autosomal recessive trait, two recessive alleles are required for the trait to manifest, while one recessive allele indicates heterozygosity.
In this case, let us assume that congenital analgesia is represented by the p allele; the heterozygous individual will be Pp.
A cross between heterozygous unaffected parents, namely:
Pp x Pp
Get a chance at offspring.
PP, Pp, Pp, PP
The ratio of offspring unaffected by ¾ and affected by ¼.
The probability that the first two children have congenital analgesia = the probability that the first child has congenital analgesia, and the second child has congenital analgesia, then
= 1/4 x 1/4
= 1/16
= 0.0625
= 6.25%
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which of the following is an example of directional selection? question 34 options: a) a mouse population that is originally white in color becoming darker in color after several generations b) a flower population that originally ranges from white to red becoming mostly pink over several generations c) a moth population that is originally grey gradually dividing into discrete white and black populations over several generations
An example of directional selection A: a mouse population that is white in color originally then becoming darker in color after several generations.
Directional selection is a type of natural selection in which a certain phenotype (characteristic or trait) becomes more common in a population over time due to environmental factors that favor that trait.
This can happen, for example, if a certain coloration provides better camouflage for prey animals, or if a larger body size provides better resistance to cold temperatures. Directional selection can result in the evolution of a new species or subspecies if the favored phenotype becomes widespread enough and is no longer able to interbreed with other populations.
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if a population of oak trees has acorns with a circumference most commonly occurring at 2cm, what would you expect the most common circumference to be after 15 generations of directional selection?
Since it is a directional stabilization, the extreme features will be favored and so after 15 generations, the most commonly occurring acorns will have circumference either lesser or more than 2cm.
Directional stabilization occurs when individuals which have traits present on one side of the mean in the population survive better or we can say reproduce more than those on the other side.
The population of the oak trees has acorns which have a circumference which is most commonly at 2 cm. This means that 2 cm is the intermediate value. Since it is a directional stabilization, the extreme feature present on either side of the distribution will be favored and hence the acorns with circumference of either less or more than 2 cm will be preferred.
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which sympathetic fibers form a splanchnic nerve? which sympathetic fibers form a splanchnic nerve? those that synapse with parasympathetic fibers those that synapse in the same trunk ganglion they entered those that synapse with somatic fibers those that pass through the trunk ganglion to synapse in collateral or prevertebral ganglia
The sympathetic fibers that pass through the trunk ganglion to synapse in collateral or prevertebral ganglia form a splanchnic nerve.
There are five splanchnic nerves: the greater, lesser, least, lumbar, and sacral splanchnic nerves. These nerves are made up of sympathetic fibers that pass through the trunk without synapsing. These are referred to as abdominopelvic splanchnic nerves together.
The sympathetic thoracic trunk is where the splanchnic nerves emerge, innervating the belly. Their main therapeutic application is in splanchnic surgery, when denervation of splanchnic nerves is primarily performed to treat chronic visceral discomfort.
At their synapses in the ganglia, sympathetic preganglionic fibers produce acetylcholine (Ach). They emit Ach, which is why they are known as cholinergic fibers.
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select all that apply: which of the following is characteristic of a carrier protein in a plasma membrane? select all that apply: which of the following is characteristic of a carrier protein in a plasma membrane? it is a peripheral membrane protein it is an integral membrane protein it exhibits a specificity for a particular type of molecule it requires the expenditure of cellular energy to function it is not specific to any one type of molecule
The characteristic of a carrier protein in a plasma membrane is they present a particular type of molecule. So the answer is:
It exhibits specificity for a particular type of molecule
Carrier proteins are membrane proteins that are committed to the journey of ions, small molecules, and macromolecules from one side to the other of biological membranes. The way they do this is by alternating its conformation as the molecule enters the protein, then releasing the molecule across the cell membrane from where it goes in the carrier protein. Carrier proteins only transport certain molecules, which is why they are distinguishing. They admit the cell to precisely administer the number of various molecules that influx and efflux the cell. The membrane transport protein that plays a role in the entry and exit of these molecules is Transportom.
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D
Question 10
10 pts
Bed bugs might sound like an old-fashioned problem, but now they are back with a vengeance. Fifty
years ago, the blood-sucking pests were nearly eradicated in the United States thanks in part to the
use of pesticides like DDT. Today, they are creeping over sheets and tormenting sleepers across the
country. New York was recently declared America's most bed-bug-infested city in America. In the
past, we countered the bed bugs by using pesticides called pyrethrins and pyrethroids. These
compounds work by attacking the nervous system. Insects have channels in the membranes of their
nerve cells that can be opened to allow sodium into the cells, triggering a nerve impulse. Pyrethrins
and pyrethroids alter the nervous system by binding to the sodium channels, locking them in the
open position. This allows sodium to pour into the cell continuously, causing the nerve to fire
repeatedly and eventually leading to paralysis. Todays bed bugs seem to be more resistant to the
chemicals that previously killed them. Cases of resistance have been reported in all classes of pests:
crop diseases, human diseases, weeds, rodents, and insects, with crises in insect control beginning
shortly after the introduction of pesticide use in the 20th century.
Why do insect pests become resistant so readily to the pesticides used for control?
O Mutation in only a single gene can lead to the evolution of a resistant organism.
An effective way to reduce pesticide resistance is to develop new pesticides.
We often rely almost exclusively on pesticides for pest control and this decreases selection pressure towards
resistance.
O Insect exoskeletons reduce the effectiveness of pesticides and the death rate is much lower than was ever
expected.
Answer: In summary, the process of natural selection, widespread and frequent use of pesticides and genetic variation within the insect population all contribute to the rapid evolution of resistance to pesticides.
Explanation:
Insect pests become resistant to pesticides because of the process of natural selection. When pesticides are used to control insect populations, the insects that are most susceptible to the pesticides die off, leaving behind those that are less susceptible. Over time, these less susceptible insects reproduce and pass on their resistance to their offspring.
Additionally, the widespread and frequent use of pesticides can accelerate this process of resistance development. When pesticides are used on a large scale and with high frequency, the population of pests that are resistant to these pesticides will increase. As these insects are more likely to survive and reproduce, the resistant population will grow more quickly than the susceptible population.
Another reason for the rapid evolution of resistance to pesticides is the genetic variation that exists in insect populations. Some insects have genetic mutations that make them resistant to pesticides. When these insects are exposed to pesticides, the resistant insects will survive, reproduce, and pass on their resistance genes to their offspring.
help me with this question for science
molluscs that have an elongated shell, open at the top and tapered like an elephant tusk, are called . multiple choice question.
The mollusks of the class Scaphopoda are alluded to as the tusk shells in light of the fact that their shells are molded like elephant tusks. The leftover classes have fewer species.
Chitons have lengthened, reciprocally balanced, dorsoventrally straightened bodies with an oval framework. The shell covers the vast majority of the dorsal surface and comprises eight covering calcareous plates. The expansive, oval, level foot is utilized for connecting to and crawling gradually over hard foundations.
Molluscs are a clade of organic entities that all have delicate bodies which ordinarily have a "head" and a "foot" district. Frequently their bodies are covered by a hard exoskeleton, as in the shells of snails and shellfish or the plates of chitons.
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describe the steps involved in converting the information contained in a gene into a protein. full detail
There are two main steps involved in converting the information contained in a gene into a protein: translation and transcription Gene expression is the sum of transcription and translation.
The information that is stored in a gene's DNA is transferred to a similar molecule called RNA (ribonucleic acid) in the cell nucleus during the transcription process. RNA and DNA both consist of a chain of building blocks called nucleotides, but their chemical properties are slightly different. Because it carries the information, or message, from the DNA out of the nucleus into the cytoplasm, the kind of RNA that contains the information needed to make a protein is known as messenger RNA (mRNA).
The cytoplasm is where translation takes place, the second step in the process of turning a gene into a protein. A specialized complex is known as a ribosome, which "reads" the mRNA nucleotide sequence, interacts with the mRNA. A codon is a sequence of three nucleotides that typically codes for a specific amino acid. The building blocks of proteins are amino acids.) The protein is put together one amino acid at a time by transfer RNA (tRNA), a type of RNA. Until the ribosome encounters a "stop" codon—a sequence of three nucleotides that does not encode for an amino acid—protein assembly continues.
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think about the genetic relationship between an adult human and his/her gametes. is a sperm cell genetically different than, say, a skin cell from the same adult?
Yes, a sperm cell is genetically different from a skin cell from the same grown-up. This is because sperm cells, unlike skin cells, contain only half of the grown-up’s inheritable material.
Sperm cells are also haploid cells, meaning they contain a single set of chromosomes, whereas skin cells are diploid cells, meaning they contain two sets of chromosomes. This difference is due to a process called meiosis that sperm cells suffer to come haploid. During meiosis,
The two sets of chromosomes from the grown-up’s diploid cells are aimlessly distributed, performing in only half of the original inheritable content being present in the sperm cells. This is why sperm cells are genetically different from the skin cells of the same grown-up.
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which of the following accurately describes mutation? group of answer choices mutations occur randomly. it is likely that multiple individuals in a population will experience the same mutation simultaneously. mutations occur when they are beneficial to members of the population. mutations occur in response to an environmental pressure
A mutation is basically an alteration in the genetic sequence of an organism which happens to occur randomly.
A genetic mutation, or simply, a mutation is a change or an alteration which occurs in an organism's genome. Most of the mutations happen to occur randomly. They may or may not be present in multiple individuals in a particular population. It might also be present in a small part of the population or in a larger chunk of it.
Not all the mutation are beneficial. Some mutation can be lethal while other might have no effect at all. Mutations can occur due to multiple factors and not just environmental factors. These factors can be both internal factors as well as some external factors.
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3. amino acid residues in proteins are each specified by three contiguous bases. what is the contour length of a segment of b-dna that encodes a 50-kd protein?
The shape length of a fragment of B-DNA is 4616 Åor 0.46 µm.
The code: codons. In a DNA succession, the code for every one of the 20 normally happening amino acids comprises a grouping of three nucleotide bases, which we'll simply allude to with three "letters," like ATG, or CCC. Review that A = adenine, C = cytosine, T = thymine (or U = uracil in RNA), and G = guanine.
Be that as it may, a trio code produces 64 (43 = 64) potential blends or codons. In this manner, a trio code presents the issue of there being multiple times the number of codons than amino acids.
A succession of three back-to-back nucleotides in a DNA or RNA particle that codes for a particular amino corrosive. Certain codons signal the beginning or end of interpretation. These are called start or stop (or end) codons.
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differences among plant species in flower morphology explain the range of insect species that act as
Differences among plant species in flower morphology explain the range of insect species that act as pollinators.
What are pollinators?
Pollen is transferred by pollinators from the male stamen of a flower to the female stigma of that same bloom.
Bees, wasps, birds, butterflies, moths, flies, and even some tiny mammals, such as bats, are among the pollinators.
Bees and other insects rely on nectar and pollen for feeding, and plants rely on insects to spread pollen to other members of the same species in order to promote cross-pollination.
Mutualism is the term used to describe the relationship in which both creatures profit.
Thus, the variety of insect species that serve as pollinators is explained by variations in flower shape between plant types.
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An oxygen atom has eight protons. From this information, can you determine numbers of neutrons and electrons in an oxygen atom? Explain.
The information provided indicates that oxygenation contains 8 protons, 8 neutrons, and 8 electrons.
How are the amount of electrons determined?There are precisely quite so many electron as protons in a neutral atom. The total number of neutrons and protons in the atom's nucleus is identical to the mass number (M) of the atom. The differential between the atomic number and also the mass value of the atom (M) is equal to the amount of neutrons (Z).
The atomic weight may be used to compute the different neutron counts. Since the weight of the neutrons and protons are essentially the same (approximately one), and oxygen has an atomic weight of 16, you should subtract this value to get the neutron number.
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during the evolutionary synthesis, biologists conclusively identified natural selection, gene flow, genetic drift, and mutation as the major causes of evolution within species. using the biological definition of evolution, explain how one of these forces causes populations, species, and higher taxa to evolve. (1-3 sentences)
Evolution is defined as change in genetic makeup of population over generations.
Population may change because of forces of evolution. It includes
- Natural Selection- Genetic Drift- Mutations- Gene Flow.Evolution because of natural selection depends on fitness. It means individuals with more heritable traits and which makes them more fit will survive in given environment. It means individual who is better to survive and reproduce will produce more offspring than other members of the population. Genetic drift results in evolution by chance events due to sampling error. It randomly select alleles for the next generation. Mutations are the sources genetic variation. All mutations do no leads to evolution. Therefore, mutations from one generation to the another depends on other factors such as natural selection.
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