Which of the following circumstances are necessary for evolution to occur? Select all that apply. a. Variation for a particular trait exists within a population. b. Competition does not exist, and organisms do not struggle to survive. c. The most common form of variant is always favorable, leading to stabilizing natural selection. d. The environment does not change.e. A particular trait must be able to be passed on to the next.
Answers
The circumstances necessary for evolution to occur are:
a. Variation for a particular trait exists within a population. (Applies)
b. Competition does not exist, and organisms do not struggle to survive. (Does not apply)
c. The most common form of variant is always favorable, leading to stabilizing natural selection. (Does not apply)
d. The environment does not change. (Does not apply)
e. A particular trait must be able to be passed on to the next generation. (Applies)
Therefore, the correct answers are a. Variation for a particular trait exists within a population and e. A particular trait must be able to be passed on to the next generation.
Variation ensures that individuals within a population possess different traits, allowing for natural selection to occur. This variation provides the raw material for evolutionary change.
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Related Questions
Which phase consistently has the least number of cell in that phase?
Answers
Answer:
Cytokinesis had the least number of cells in that phase.
In one experiment, Mendel grew 633 green pea plants with wrinkled seed covers. If the ratio of wrinkled seed plants to straight coat seed plants was 3: 1, how many straight coat seed plants did he grow? *
Answers
Answer:
31
Explanation:
Zoo H Ch. 38 Ws Animal Ecology Name
Date
Pd
CrossWorld
7
10
2 pat
ACROSS
mimicry
1o an example of a
secondary consumer
11 density
12 king shake
ninics a
13 plants are primary
16 a pyramid is
lost at ca. level
17 an example of a top
20 different species
that interact
22 energy
24 an example of a
resource
25 competitive
26 job or role
27 animal oats - plant
DOWN
1 an example of a
consumer
is the
greatest threat
3 the owl is the top
4 both benefit
5 resources
601T pop. have the
ability to grow
7 density
break down dead
organic matter
9 interconnected
pathways
are a food
13 one benefits; host
is harmed
14 an individual
15 ecological
18 both the living &
nonliving
19 an example of a
decomposer
21 batesian
23 relationship between
animals & environ.
11
12
15
13
16
17
18
20
21
22
23
24
25
26
27
Answers
Answer:
tuyyuuy yang utama adalah hal yg sama berulang-ulang dan terus
Explanation:
hjooyffhiu ini Dion LG belajar tema yang nomor satu di antara mereka yang nomor satu di antara mereka yang nomor satu di antara mereka yang
Select the correct location on the image.
Karla list the steps of her scientific analysis in the form of a flow chart. Which step should Karla go back to as a result of her conclusions?
Answers
answer is already correctly displayed in the photo
Answer:
1
Explanation:
If Earth has 150,100,000 km^2 of
land area, how much land area is included in the
biodiversity hotspots?
PLS HELP NEED FOR TODAY!!!
Answers
Explanation:
A biodiversity hotspot is a biogeographic region with significant levels of biodiversity that is threatened by human habitation.[1][2]A biodiversity hotspot is a biogeographic region with significant levels of biodiversity that is threatened by human habitation.[1][2]Norman Myers wrote about the concept in two articles in “The Environmentalist” (1988),[3] and 1990[4] revised after thorough analysis by Myers and others “Hotspots: Earth’s Biologically Richest and Most Endangered Terrestrial Ecoregions”[5] and a paper published in the journal Nature.[6]A biodiversity hotspot is a biogeographic region with significant levels of biodiversity that is threatened by human habitation.[1][2]Norman Myers wrote about the concept in two articles in “The Environmentalist” (1988),[3] and 1990[4] revised after thorough analysis by Myers and others “Hotspots: Earth’s Biologically Richest and Most Endangered Terrestrial Ecoregions”[5] and a paper published in the journal Nature.[6]To qualify as a biodiversity hotspot on Myers 2000 edition of the hotspot-map, a region must meet two strict criteria: it must contain at least 0.5% or 1,500 species of vascular plants as endemics, and it has to have lost at least 70% of its primary vegetation.[6] Around the world, 36 areas qualify under this definition.[7] These sites support nearly 60% of the world's plant, bird, mammal, reptile, and amphibian species, with a very high share of those species as endemics. Some of these hotspots support up to 15,000 endemic plant species and some have lost up to 95% of their natural habitat.[7]A biodiversity hotspot is a biogeographic region with significant levels of biodiversity that is threatened by human habitation.[1][2]Norman Myers wrote about the concept in two articles in “The Environmentalist” (1988),[3] and 1990[4] revised after thorough analysis by Myers and others “Hotspots: Earth’s Biologically Richest and Most Endangered Terrestrial Ecoregions”[5] and a paper published in the journal Nature.[6]To qualify as a biodiversity hotspot on Myers 2000 edition of the hotspot-map, a region must meet two strict criteria: it must contain at least 0.5% or 1,500 species of vascular plants as endemics, and it has to have lost at least 70% of its primary vegetation.[6] Around the world, 36 areas qualify under this definition.[7] These sites support nearly 60% of the world's plant, bird, mammal, reptile, and amphibian species, with a very high share of those species as endemics. Some of these hotspots support up to 15,000 endemic plant species and some have lost up to 95% of their natural habitat.[7]Biodiversity hotspots host their diverse ecosystems on just 2.4% of the planet's surface,[2] however, the area defined as hotspots covers a much larger proportion of the land. The original 25 hotspots covered 11.8% of the land surface area of the Earth.[1] Overall, the current hotspots cover more than 15.7% of the land surface area, but have lost around 85% of their habitat.[8] This loss of habitat explains why approximately 60% of the world's terrestrial life lives on only 2.4% of the land surface area.A union could be guilty of unfair labour practices: during the union organizing campaign C during contract negotiations during the term of the collective agreement G Call of the options
Answers
A union could be guilty of unfair labor practices is; during the union organizing campaign, during contract negotiations, and during the term of the collective agreement. Option D is correct.
During the union organizing campaign; Unions can engage in unfair labor practices during the organizing campaign by using coercion, intimidation, or other improper tactics to influence employees' decisions regarding union representation.
During contract negotiations; Unions may engage in unfair labor practices during contract negotiations by engaging in bad faith bargaining, refusing to negotiate in good faith, or using coercive tactics to gain advantages in bargaining.
During the term of the collective agreement; Unions can commit unfair labor practices during the term of the collective agreement by violating the terms of the agreement, engaging in discriminatory practices, or interfering with the rights of employees protected under labor laws.
Hence, D. is the correct option.
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--The given question is incomplete, the complete question is
"A union could be guilty of unfair labor practices: A) during the union organizing campaign B) during contract negotiations C) during the term of the collective agreement D) all of the options."--
How is strawberry DNA sample similar and different to the Watson and Crick's model?
Answers
Please help
Who is karl popper and why is he important and please answer with your own word and thank you
Answers
the two reasons for thoroughly watering a newly planted shrub or tree are to
Answers
The Thoroughly watering a newly planted shrub or tree is important for two main reasons: crucial for establishing a strong root system and reducing transplant shock, both of which contribute to the overall health and success of the plant.
The Establishing root system: Watering the tree or shrub helps the roots to establish themselves in the soil. This promotes healthy growth and ensures the plant can absorb necessary nutrients and water from the soil. Reducing transplant shock: Thoroughly watering helps to minimize the stress caused by transplanting, as it provides the necessary hydration for the plant to adapt to its new environment and recover from any damage sustained during planting. In summary, thoroughly watering a newly planted shrub or tree is crucial for establishing a strong root system and reducing transplant shock, both of which contribute to the overall health and success of the plant.
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P.Science Co-PC
In the human body the breaking down of proteins and removal of waste takes place primarily in which two organ systems?
o circulatory and respiratory
O digestive and excretory
оооо
immune and nervous
musculoskeletal and reproductive
Hi
Answers
The indicates where the body can function, or what is optimal
Answers
This indicates where the body can function, or what is optimal that it is Homeostasis .
Homeostasis is the body's ability to maintain stable internal conditions despite changes in the external environment. It is a fundamental concept in physiology and refers to the body's ability to regulate its internal environment to maintain a relatively constant state of equilibrium. This balance is essential for optimal functioning of the body's cells, tissues, organs, and systems.
For example, body temperature, blood glucose levels, blood pressure, pH levels, and electrolyte balance are some of the physiological parameters that are tightly regulated by homeostatic mechanisms. When these parameters deviate from their optimal range, the body employs various physiological processes to bring them back to their normal levels, helping to maintain stability and optimal functioning.
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what is the correct order of protein production?
1) ribosome
2) endoplasmic reticulum
3) secretory vesicles
4) golgy apparatus
a) 1,2,3,4
b) 2,4,3,1
c) 1,2,4,3
d) 3,2,4,1
Answers
Answer:
The correct order of protein production is:
c) 1,2,4,3
Ribosome: Protein synthesis begins in the ribosomes, which are located either in the cytoplasm or attached to the endoplasmic reticulum.
Endoplasmic Reticulum: After the initial stages of protein synthesis in the ribosomes, the newly synthesized protein is transported into the endoplasmic reticulum (ER) for further processing and modification.
Golgi Apparatus: The proteins synthesized in the ER undergo further processing and modifications in the Golgi apparatus. This includes sorting, packaging, and modifying the proteins to their final functional forms.
Secretory Vesicles: Once the proteins are properly processed and modified in the Golgi apparatus, they are packaged into secretory vesicles. These vesicles transport the proteins to their destination, such as the plasma membrane for secretion outside the cell.
Therefore, the correct order is 1, 2, 4, 3.
Answer:
The correct order of protein production is ribosome, endoplasmic reticulum, Golgi apparatus, and secretory vesicles. So the correct answer would be c) 1,2,4,3.
Many proteins destined for the endoplasmic reticulum, the Golgi apparatus, lysosomes, the plasma membrane, and secretion from the cell are synthesized on ribosomes that are bound to the membrane of the endoplasmic reticulum. The Golgi apparatus then distributes these proteins and lipids that it receives from the ER.
An Olympic sprinter has just broken the world record for the 100-meter dash. Which process will her body likely use to recover from her “oxygen debt”?
Answers
Answer:
Anaerobic respiration
Explanation:
In anaerobic respiration, glucose breaks down without oxygen. The chemical reaction transfers energy from glucose to the cell. Anaerobic respiration produces lactic acid, rather than carbon dioxide and water.
The process through which the Olympic sprinter's body will likely use to recover from her “oxygen debt” is: an anaerobic respiration.
Anaerobic respiration can be defined as a chemical and biological process that involves the use of electron acceptor rather than oxygen to make energy (adenosine triphosphate) from carbohydrates (sugars).
Hence, an anaerobic respiration can take place or occur in the absence of oxygen.
On a related note, an anaerobic respiration is used to regain lost energy through the actions of electron acceptor when oxygen is lacking in the body.
In conclusion, the Olympic sprinter's body will likely use anaerobic respiration to recover from her “oxygen debt.”
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What is the normal/average pH level of lake in a healthy ecosystem?
Answers
Usually fresh water lakes have a pH range between 6.5 to 8.5, this is appropiate for many organisms life and development.
22. Carbon dioxide gas production happens within me...
A. Chlorophyll
B. Glycolysis
C. Mitochondria
D. Ribosome
Answers
dna is a macromolecule composed of monomers called
Answers
The monomers that make up DNA are nucleotides.
A nitrogenous base, a sugar molecule (deoxyribose in DNA), and a phosphate group make up a nucleotide. DNA nucleotides contain four different nitrogenous bases: adenine (A), guanine (G), cytosine (C), and thymine (T) (T). The genetic information that is encoded in DNA is determined by the precise arrangement of these four types of bases along the DNA molecule.
A sugar-phosphate backbone is created when the phosphate group of one nucleotide forms a covalent interaction with the sugar molecule of the following nucleotide. The particular base pairing between complementary strands of DNA is made possible by the nitrogenous bases that extend from the DNA's backbone. The two strands of DNA in a double helix are held together by hydrogen bonds formed between these complementary base pairs.
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Which of the following is directly affected by changes in the ratio of charged/uncharged tryptophan trna? terminator formation in e. colitrpr repressionlevels of anti-traptrpb expression
Answers
Based on your question, the process directly affected by changes in the ratio of charged/uncharged tryptophan tRNA is terminator formation in E. coli.
This is because the availability of charged tryptophan tRNA influences the formation of the terminator structure in the mRNA, which in turn regulates the transcription of the trp operon.
When tryptophan levels are low, the terminator structure is not formed, allowing for the expression of genes involved in tryptophan synthesis.
Conversely, when tryptophan levels are high, the terminator structure forms, halting transcription and conserving cellular resources.
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you are breathing from a scuba tank filled at sea level. as ambient pressure increases from 1 ata to 3 ata, how does this affect the numbers of oxygen molecules you are breathing?
Answers
In comparison to 1 ATA, humans breathe 3 times less oxygen molecules each breath at 3 ATA.
As long as the larynx is open, air can enter the lungs through inhalation when the air pressure in the alveolar spaces falls below atmospheric pressure; when it rises, air is expelled from the lungs.. At altitude, the blood's lower oxygen content causes breathing instability, alternating between periods of deep and fast breathing and central apnea. High-altitude periodic breathing is the name given to this breathing pattern (PB). At sea level, the oxygen content is approximately 21%, the same as it is at high altitudes. However, each breath causes the body to receive less oxygen because air molecules are more dispersed at high altitudes.
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Punnett squares can be used to predict the probability of...
Answers
Answer:
any functions lolll
Explanation:
Punnett squares are used by geneticists to determine the probability of different offspring genotypes.
What are Punnett squares?Punnett square is defined as the class diagram used to predict the genotype of a particular cross or breeding experiment, named after Reginald C. Punnett, who formulated the approach in 1905 which is to used to determine the probability of an offspring with a particular genotype.
A Punnett Square is explained as the helpful tool that helps to predict the variations and probabilities that can come from cross breeding which includes predicting crossing plants, animals, even humans with each other.
Thus, Punnett squares are used by geneticists to determine the probability of different offspring genotypes.
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Complete the senences so review the characteristics of ideal antmoobial drug a.priced b. antimicrobal resistance c. host d. pathogen e. microbiostatic f. defenses g. allergies h. infection i. microbiodal -The goal of antimicrobial therapy is to deliver a dg that wl destroy the___ without harming the___ -An ideal antimicrobial dug is___ rather than___ and is relatively soluble. -An ideal drug remains potent long enough to act, buil does not lead to the development of___ in microbial populations. -An elective dnug assists the hosts____ and should not cause_____ other infecions. -An ideal drug should be readly delivered to the site of___in the host and overall should be reasonably.
Answers
Antimicrobial drugs are designed to target pathogens and microbes in the body. The ideal antimicrobial drug is one that targets the pathogen without harming the host.
Below are the statements that complete the characteristics of an ideal antimicrobial drug:
- The goal of antimicrobial therapy is to deliver a drug that will destroy the pathogen without harming the host. The primary objective of antimicrobial drugs is to target and kill pathogens without causing harm to the host. An ideal antimicrobial drug should effectively eliminate the pathogen, preventing it from spreading further in the host.
- An ideal antimicrobial drug is bactericidal rather than microbiostatic and is relatively soluble. An antimicrobial drug that is bactericidal in nature will completely kill the pathogen rather than inhibit its growth. A soluble drug is easily absorbed and distributed throughout the body.
- An ideal drug remains potent long enough to act but does not lead to the development of resistance in microbial populations. An effective drug should remain active long enough to kill the pathogen and avoid the development of resistance. Pathogens may develop resistance to antimicrobial drugs through mutation and natural selection.
- An elective drug assists the host's defenses and should not cause allergies or other infections. The drug should not cause any allergic reactions or create new infections that may be harmful to the host. An ideal drug should work with the host's defenses to effectively eliminate the pathogen.
- An ideal drug should be readily delivered to the site of infection in the host and overall should be reasonable. The drug should be efficiently delivered to the site of infection and have minimal side effects on the host. The ideal drug should be easily accessible and affordable.
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How much is DNA important to identify a group? Give a brief explanation on race ,whiteness and property? Does biological anthropologists and genome scientist need to add the relation between Europeans and Indigenous people while doing their research?
Answers
DNA is important in identifying genetic relationships within a group, but it alone is not sufficient to determine complex social constructs like race, whiteness, or property; the inclusion of social, cultural, and historical factors is crucial in understanding these concepts.
Biological anthropologists and genome scientists should consider the relationship between Europeans and Indigenous people in their research to provide a more comprehensive understanding of human genetic diversity and population history.
DNA analysis can provide valuable insights into genetic relationships within a group, such as determining genetic ancestry or identifying related individuals. However, race, whiteness, and property are social constructs that go beyond genetic factors and are shaped by historical, cultural, and socioeconomic factors. These concepts are complex and cannot be solely explained by genetic data. Therefore, it is important for researchers, including biological anthropologists and genome scientists, to recognize the limitations of genetic data and consider the broader social context when studying race, whiteness, and property.
In the context of researching Europeans and Indigenous people, it is crucial for researchers to acknowledge and incorporate the historical and ongoing relationships between these groups. This includes understanding colonization, displacement, and the impact of power dynamics on genetic diversity and health outcomes. By including this relationship in their research, scientists can contribute to a more accurate and nuanced understanding of human genetics and promote social and scientific equity.
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What is the largest problem with implementing CRISPR based technologies for therapy, and
also a major headache for researchers using CRISPR for making animal models for human
diseases:
A. Technique is very laborious
B. Off-target editing events at loci with imperfect sequence matching
C. Sequence of RNA guides is very expensive
D. Require a transfer with potentially oncogenic viral vectors
E. All of the above
Answers
The largest problem with implementing CRISPR based technologies for therapy and a major headache for researchers using CRISPR for making animal models for human diseases is B) off-target editing events at loci with imperfect sequence matching.
While the other options listed (A. Technique is very laborious, C. Sequence of RNA guides is very expensive, and D. Require a transfer with potentially oncogenic viral vectors) are also concerns, the risk of off-target effects is considered the most significant challenge in using CRISPR for therapeutic and research purposes.
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How do stars balance the force of gravity and fusion?
Answers
Answer:
Inside a star there is force of gravity balanced by the outward force of pressure. The star nuclear reactions are kept under control by a pressure temperature thermostat.
Explanation:
Some illnesses and harmful infections are caused by bacteria. These bacteria grow in the human body and often make people sick with symptoms like coughing, sneezing, and fever. These illnesses are not related to any genetic mutations or other problems with DNA.
Why would gene therapy fail to cure illnesses caused by bacteria?
Gene therapy reduces symptoms but never cures illnesses.
Gene therapy does not work on most people.
Gene therapy only focuses on replacing mutated genes.
Gene therapy is too long a process.
Answers
Answer:
C. Gene therapy only focuses on replacing mutated genes.
Explanation:
Hope this helps! Have a good day! :)
The study of animals is called zoology.
The correct answer is C.
Gene therapy is defined as the removal of the mutated gene and placing the correct genes in the DNA to correct the DNA sequence.
Gene therapy is used only to cure genetic diseases like ADA.
Bacteria do not infect the genes of an individual. It targets its immune systems due to which mentioned symptoms are shown.
Hence, the correct answer is C that is Gene therapy only focuses on replacing mutated genes.
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The cone-shaped landform shown in the image above is located in northeastern New Mexico. This landform is a _______, and it was created by a _______ process.
A.
fault; destructive
B.
sand dune; destructive
C.
glacier; constructive
D.
volcano; constructive
Answers
Answer:
D. Volcano;constructive
Explanation:
wild foxes are aggressive and unfriendly toward humans. however, russian scientists have worked since the 1950s to breed a domesticated version of the silver fox. each year, the scientists choose the tamest foxes to mate together. gradually, the foxes are becoming more like dogs. they are much more friendly and playful than wild foxes. what technique is used to increase desirable traits in domesticated animals through breeding?
Answers
Artificial selection is the technique used to introduce desirable traits in domesticated animals through breeding.
Artificial selection is a method for raising domesticated animals to increase desirable traits. It is the practice of breeding animals for their desirable qualities using a means other than natural selection or the organism itself. Using artificial selection to control the genetic transfer of the desired traits, selective breeding is a sort of artificial selection.
Russian scientists have been employing selective breeding to create a domesticated variety of the silver fox since the 1950s. They achieve this by pairing the year's most docile foxes. Because of this, foxes have evolved into becoming more desirable and livelier than wild foxes over time, becoming more like dogs.
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What is the natural source of energy in Mars and how is created, fission of fusion?
Answers
Answer:
Fission and fusion are two processes that alter the nucleus of an atom. Nuclear fission provides the energy in nuclear power plants and fusion is the source of the sun's energy. The use of fission in power plants can help conserve fossil fuels.
Explanation:
In physiological terms, what distinguishes humans from all other living organisms.
Atmospheric pressure at sea level is 1 bar.
A) If we climb a mountain andthe pressure at the top is 0. 5bar, what is the partial pressureof oxygen?
B) If I have abllon with a volume of 1 L at sea level, what is its volume at the top of the mountain where the total pressure is 0. 5 bar?
Answers
In physiological terms, one key distinction that sets humans apart from all other living organisms is their ability to adapt to different atmospheric conditions.
Atmospheric pressure at sea level is 1 bar. When climbing a mountain and reaching the top where the pressure is 0.5 bar, the partial pressure of oxygen can be determined using Dalton's law of partial pressures.
A) To find the partial pressure of oxygen, we multiply the total pressure (0.5 bar) by the fractional concentration of oxygen in the air. The fractional concentration of oxygen at sea level is approximately 0.21. Thus, the partial pressure of oxygen at the top of the mountain would be 0.5 bar * 0.21 = 0.105 bar.
B) The volume of a balloon at the top of the mountain can be determined using Boyle's law, which states that the volume of a gas is inversely proportional to its pressure when temperature is constant. Assuming the temperature remains constant, we can use the equation P1V1 = P2V2 to calculate the volume.
At sea level, the volume is 1 L and the pressure is 1 bar. At the top of the mountain, the pressure is 0.5 bar.
Thus, we have (1 bar)(1 L) = (0.5 bar)(V2).
Solving for V2, the volume at the top of the mountain would be 2 L.
So, in conclusion:
A) The partial pressure of oxygen at the top of the mountain would be 0.105 bar.
B) The volume of the balloon at the top of the mountain would be 2 L.
Please note that these calculations are based on idealized assumptions and do not take into account various factors such as temperature changes or variations in oxygen concentration.
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Which process begins with the replication of DNA in the nucleus of a cell?
A. cell division
B. energy capture
C. protein synthesis
D.cellular respiration
Answers
A. Cell division
Replication of DNA happens in interphase, s-phase
The process that begins with the replication of DNA in the nucleus of a cell is cell division, which is present in option A, and in the cell division phase, the cell divides to form daughter cells.
What is cell division?Cell division is a process in which the cell first grows in the G1 phase of the cell cycle, then replicates DNA in the S phase, then enters the G2 phase, and finally enters the mitosis or cell division phase. The DNA replication starts in the S phase, and in this phase, the DNA divides to form two DNA strands, so that in the division phase, each daughter cell gets parental DNA.
Hence, the process that begins with the replication of DNA in the nucleus of a cell is cell division, which is present in option A, and in the cell division phase, the cell divides to form daughter cells.
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Human body cells each have 46 chromosomes in their nuclei. Meiosis is necessary in order to ensure that each gamete produced in the human body has —
12 chromosomes
23 chromosomes
46 chromosomes
92 chromosomes
Answers
Answer:
B) 23 chromosomes
Explanation:
46 ÷ 2 = 23
To ensure so each gamete created inside the human body contains 23 chromosomes, meiosis is required.. So, the correct option is B.
What is Meiosis?In sexually reproducing organisms, meiosis is a unique form of division of germ cells that results in the production of gametes, including such sperm or egg cells. Two rounds of duplication are necessary, and the end product is four cells with just one duplicate of each chromosome.
Consequently, meiosis produces four haploid daughter cells that are each genetically distinct and have half the DNA of a parent cell The parent cell of a human cell has sets of chromosomes (23 pairs which are 46 chromosomes), hence the cells created during meiosis have 23. Gametes will develop from these cells. To ensure so each gamete created inside the human body contains 23 chromosomes, meiosis is required.
Therefore, the correct option is B.
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