Asexual reproduction is used by the single-celled organism known as the paramecium.
The offspring of a paramecium usually contain (3) genetic materials identical to that of the parent cell.
In asexual reproduction, the offspring are produced by cell division without the involvement of sexual reproduction. This means that the offspring are genetically identical to the parent cell, as they are created by the division of a single parent cell into two or more daughter cells. The genetic material of the parent cell is replicated and passed on to the offspring, so the offspring will have the same DNA as the parent cell.
It is important to note that if mutations are present in the parent cell, they will also get passed to the offspring and the mutations will be present in the descendant cells as well.
The complete question is:-
The paramecium is a single-celled organism that reproduces asexually. The offspring of a paramecium usually contain
(1)only half of the genes of the parent cells
(2)more DNA than the parent cell
(3)genetic material identical to that of the parent cell
(4)fewer mutations than the parent cell
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Who first isolated and identified DNA?
The discovery of DNA can be attributed to a number of scientists, but the first person to isolate and identify it was Swiss physician and biologist Friedrich Miescher.
Miescher’s discovery of “nuclein” as he called it, occurred in 1869 while he was studying white blood cells from pus. He observed that there was a substance in the nucleus of these cells that was different from proteins, which were the only known biomolecules at the time. He called this substance “nuclein”.
Miescher’s breakthrough was largely ignored for the next 50 years, until other scientists began to recognize its importance. In the 1950s, James Watson and Francis Crick used X-ray crystallography to determine the structure of DNA, and it was then that the full implications of Miescher’s discovery were realized.
Miescher’s work was the foundation for the discoveries of Watson and Crick, which led to the modern understanding of DNA. While Miescher’s discovery was largely overlooked for many years, it is now recognized as one of the most important discoveries in modern science. Without Miescher’s work, the field of genetics and our understanding of the mechanisms of life would not be where it is today.
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Can anyone answer these questions please?
We can ascertain genotypes, recognize phenotypes, and forecast how well a trait will indeed be passed down in the future by studying a pedigree. It is feasible to ascertain using pedigree information.
What kinds of phenotypes are examples?Phenotypes include things like height, wing span, and hair color. Phenotypes have included blood cell of hormone levels in addition to quantitative features that may be seen and analyzed in a lab.
What is the meaning of phenotype?Any clinical manifestation of an individual with a certain genotype; the visible qualities of an individual that are an outcome of gene expression.
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Saccharomyces cerevisiae is a diploid yeast species that can reproduce either sexually or asexually. An experiment was performed to induce mitotically dividing S. cerevisiae cells in G2 to undergo meiosis. Which of the following best describes the steps these cells will follow to form gametes?
Saccharomyces cerevisiae is a diploid yeast species, which means that it has two copies of each chromosome. To form gametes, S. cerevisiae cells must go through a process called meiosis.
Meiosis is a type of cell division that results in the formation of four genetically diverse haploid cells, each with half the number of chromosomes as the parent cell.
The steps the cells will follow to form gametes are:
Prophase I: The chromosomes condense and become visible under a microscope. Homologous chromosomes pair up and exchange genetic material through a process called crossing over.
Metaphase I: The homologous chromosomes line up at the center of the cell.
Anaphase I: The paired homologous chromosomes are separated and pulled to opposite poles of the cell.
Telophase I: The chromosomes reach the poles and the cell begins to divide.
Cytokinesis: The cell physically divides in two, forming two haploid cells.
A second round of cell division, called meiosis II, takes place in which the chromosomes are again separated resulting in the formation of four haploid cells.
It's worth to mention that, yeast cells are capable of switching between sexual and asexual reproduction depending on environmental conditions. The formation of meiotic spores depends on the presence of specific nutrients, mating partners and stress.
Which of the following best describes how DNA moves through a gel during electrophoresis?
The positively charged DNA moves towards the negative end of the gel and away from the positive end of the gel.
The positively charged DNA moves towards the positive end of the gel and away from the negative end of the gel.
The negatively charged DNA moves away from the negative end of the gel and towards the positive end of the gel.
The negatively charged DNA moves towards the negative end of the gel and away from the positive end of the gel.
Option 4 is Correct. Since DNA is negatively charged, it will move toward the positively charged electrode when an electric current is supplied to the gel.
DNA Fragments:DNA fragments are divided into categories based on their mass and size using gel electrophoresis. Because DNA is negatively charged, it will move in the direction of the positive electrode. The separation will therefore depend on how big the pieces are. The larger DNA molecules follow the smaller ones in terms of speed and distance traveled.
An electric current is used to draw DNA samples across a gel after they have been inserted into wells (indentations) at one end of the gel. Due to their negative charge, DNA fragments gravitate toward the positive electrode.
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Correct Question:
Which of the following best describes how DNA moves through a gel during electrophoresis?
1. The positively charged DNA moves towards the negative end of the gel and away from the positive end of the gel.
2. The positively charged DNA moves towards the positive end of the gel and away from the negative end of the gel.
3. The negatively charged DNA moves away from the negative end of the gel and towards the positive end of the gel.
4. The negatively charged DNA moves towards the negative end of the gel and away from the positive end of the gel.
Across
1. A volcano surrounded by tall,
cone-shaped mountain made out of
lava, ash, and pyroclasic rock.
3. Piles of hardened lava
surrounding an underwater volcanic
eruption.
5. Large boulder like chunks of
cooled lava that is shot up in the air
during an eruption.
8. A pit in the ground left by a
collapsed volcano.
9. Small pieces of lava.
12. Pools of water warmed by hot
rocks beneath ground.
14. Rock formed from materials
deposited at the bottom of a body of
water.
17. Glassy strains of harden
volcanic material.
18. The independently moving pieces
of the Earth's crust.
19. Fields of hardened lava in
smooth, rope like strands.
20. A volcano surrounded by gently
sloping hills in a circular or
fan-shaped pattern.
Down
2. A volcano surrounded by a small
Icone of volcanic rock.
4. Magma that has risen to the
surface of the Earth.
Composite volcanoes have steep sides, are towering, and may reach heights of up to 10,000 feet. They are constructed from alternating layers of cinders, volcanic ash, and lava flows.
What kind of volcano is a composite volcano?Large volcanoes (tens of thousands of feet or meters tall) that are made up mostly of lava flows, pyroclastic deposits, mudflow (lahar) deposits, and lava domes are known as composite cones. Composite volcanoes frequently erupt during extended epochs (tens to hundreds of thousands of years).
What features distinguish a composite volcano?Composite volcanoes have steep sides, are towering, and may reach heights of up to 10,000 feet. They are constructed from alternating layers of cinders, volcanic ash, and lava flows. the Japanese volcano Mount Fuji, the Californian Mount Shasta, and the American Mount
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Identify the key structural features of a DNA molecule
a. DNA strands are antiparallel and include a 5'end and a 3'end.
b. Strong ionic bonds and hydrophobic interaction hold DNA together.
c. DNA contains the nucleotide bases adenine, thymine, guanine, cytosine, and uracil.
d. DNA is most often found as a left-handed helix, commonly referred to as Z-DNA.
e. The backbone of DNA is made of a sugar and a phosphate molecule.
f. DNA bases are always paired purine with pyrimidine.
Answer:
the backbone of a DNA is made of a sugar and a phosphate molecule
dna strands are antiparallel. what does that mean?
DNA strands are antiparallel because two strands run in opposite directions of one another.
DNA structureDNA, an abbreviation of deoxyribonucleic acid, codes genetic information.
The structure of DNA is a double helix, which means spiral, and consists of two DNA strands. Each strand is made of nucleotides. As the monomer of DNA, each nucleotide consist of a phosphate, nitrogenous base, and deoxyribose sugar, but the orientation of the sugar molecule is opposite in the two strands.
Both strands of DNA grow from [tex]5^{'}[/tex] to [tex]3^{'}[/tex] end, in opposite directions.
The antiparallel orientation makes the base pairs can complement each other and structurally more stable than parallel. This structure also affect when DNA replication.
Thus, DNA strands are antiparallel means that one strand runs in [tex]5^{'}[/tex] to [tex]3^{'}[/tex] direction and the other runs in [tex]3^{'}[/tex] to [tex]5^{'}[/tex] direction.
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Answer:
opposites and parallel
Explanation:
Nondisjunction is when chromosomes do not separate correctly in anaphase. Nondisjunction in meiosis II produces g
Sister chromatids cannot split during anaphase II, which leads to nondisjunction in meiosis II. Two of the four daughter cells will contain the typical complement of 23 chromosomes.
What happens if a nondisjunction occurs during meiosis II?Two of the four products will be unharmed by the event and two will be aberrant if nondisjunction occurs in meiosis II. In contrast to the other aberrant product, which lacks that chromosome, one abnormal product has one extra chromosome.
What transpires in meiosis I, II, or mitosis when nondisjunction has place?In meiosis I (first row), meiosis II (second row), and mitosis, nondisjunction, in which chromosomes fail to split equally, can take place (third row).
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The complete question is -
When chromosomes do not properly separate during anaphase, it is known as nondisjunction. gametes are produced by meiosis II nondisjunction?
Use the diagram to answer questions 1-3 about relative dating.
1. Which fossil species seems the oldest?
2. Which species seems to have evolved more recently?
3. Which species evolved first: Ammonite or Crinoid Stem?
Based on the given chart, following is the characteristic of different fossil species - Trilobite fossil species seems the oldest, Crinoid species seems to have evolved more recently, Ammonite species evolved first.
Fossils -The existence of fossils, which also demonstrate how various species have evolved, provides indisputable proof that ancient organisms were distinct from those that are alive now.
The morphological, or anatomical, record is the comparative anatomy of living species and fossils. Paleontologists can determine the lineages of various species by examining the anatomy of both living and extinct species.
For species having hard body components like shells, bones, or teeth, this strategy is effective. As a result, the fossil record tells the tale of the past and demonstrates how shape changed over the course of millions of years. All fossils, known and unknown, are included in the fossil record, along with their stratigraphic and fossiliferous localities (rock formations that contain fossils).
Trilobite fossil species seems the oldest.
Crinoid species seems to have evolved more recently.
Ammonite species evolved first.
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which human activity has a negative impact on animal populations
Answer: pollution
Explanation:
Deforestation, the clearing of forests on a large scale, is a human activity that has a significant negative impact on animal populations.
Option (A) is correct.
The removal of forest habitats directly and indirectly affects animal populations in several ways.
Habitat loss: Deforestation destroys the natural habitats of countless animal species. As forests are cleared for agriculture, urbanization, or logging, animals lose their homes, leading to displacement, fragmentation, and reduced access to food, water, and shelter.
Disruption of ecological balance: Forests play a crucial role in maintaining ecological balance. Deforestation disrupts this balance, leading to changes in species composition, food webs, and ecological interactions.
Threats to endangered species: Many endangered animal species rely on forest ecosystems for their survival. Deforestation poses a severe threat to these vulnerable populations, pushing them closer to extinction.
Loss of biodiversity: Forests are rich in biodiversity, hosting numerous animal species. Deforestation diminishes this biodiversity, resulting in the loss of unique genetic resources and potential benefits derived from their interactions.
The negative impact of deforestation on animal populations highlights the importance of sustainable land use practices and conservation efforts to protect and preserve habitats for the well-being of wildlife.
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The complete question is:
Which human activity has a negative impact on animal populations?
A. Deforestation
B. Pollution
C. Overfishing
D. Habitat fragmentation
A car is accelerating from rest at a constant rate. The net force acting on the car is increasing true or false
Answer:
False
Explanation:
because if it were increasing then the car would be increasing
I hope this helped you
Which statement is true about fossils?
O Most life on earth has been preserved as fossils.
O The conditions for forming fossils are rare.
O Any organism can be preserved as a fossil no matter its form.
O The fossil record provides a thorough and complete view of Earth's history.
Answer: I believe The conditions for forming fossils are rare.
Explanation: hope this helps
Which of the following answer choices does not include an application of biotechnology?
GMOs
Gel electrophoresis
Crossing over
Transgenic organisms
Hence the correct answer is Transgenic organisms.
What are the 4 applications of biotechnology?Therapeutics, diagnostics, GM food, processed food, bioremediation, waste treatment, and energy production are only a few examples of the applications of biotechnology. We can now battle hunger and disease, produce more safely, cleanly, and efficiently, minimise our ecological imprint, and save energy thanks to the five branches of modern biotechnology: human, environmental, industrial, animal, and plant. When developing or producing various products, biotechnology makes use of biological systems, living organisms, or components of these. Examples of procedures that fall under the definition of biotechnology include brewing and baking bread (yeast is a live creature that can be used to produce the desired result).To learn more about biotechnology refer to:
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These animals live in the Sound’s salt marshes, eating a mixture of plants and animals, and were hunted to near extinction.
The animals that live in the Sound’s salt marshes, eating a mixture of plants and animals, and were hunted to near extinction is the Diamondback terrapins.
Why do animals go into extinction?There are many reasons why animals go into extinction and they include:
Habitat loss which is the primary cause of higher extinction rates.habitat changes, over-exploitation of wildlife for commercial purposes, the introduction of harmful nonnative species, pollution, and the spread of diseases.The diamondback terrapin is a species of turtle native to the brackish coastal tidal marshes of the Northeastern and southern United States, and in Bermuda.
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How is chemical weathering best described?
O It is the breakdown of rock by a change in its chemical composition.
O It is the buildup of rock formations over long periods of time.
O It is the breakdown of rock through mechanical disintegration and physical stress.
O It is the buildup of chemical deposits on the surface of rock.
The DNA of an elephant and the DNA of a cherry tree will probably differ in all of the following respects EXCEPT the. B. kinds of nucleotides utilized in ...
The types of nucleotides used to create DNA are likely to vary between the DNA of an elephant and a cherry tree.
Which of the following doesn't make up the structure of DNA?Deoxyribose sugar, a phospate molecule, and one nitrogenous base from adenine, guanine, thymine, and cytosine are all components of the nucleotides that make up DNA strands. Uracil never makes up a DNA nucleotide. It can be found in RNA.
What are the top three structural differences between DNA and RNA?Therefore, the three primary structural differences between RNA and DNA are as follows: RNA has a single strand, whereas DNA has two. RNA has uracil while DNA has thymine. Deoxyribose is a sugar that is present in DNA but not RNA.
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Question:
The DNA of an elephant and the DNA of a cherry tree will probably differ in all of the following respects EXCEPT the
A. kinds of genes for which the DNA codes
B. kinds of nucleotides utilized in forming DNA
C. number of DNA molecules
D. length of DNA molecules
E. sequence of DNA nucleotides
Your tongue breaking pieces of a hamburger apart?
Answer:
True
Explanation:
A set of biology exam scores are normally distributed with a mean of 606060 points and a standard deviation of 666 points. Antoaneta got a score of 515151 points on the exam. What proportion of exam scores are higher than antoaneta's score? you may round your answer to four decimal places.
The proportion of test scores that are higher than Antoaneta score is 0.9332.
Antoaneta scored 51 points on the test with a normal average of 60 points.
Antoaneta's score is 51 − 60 = − 9 relative to the average.
Standard deviations are relative to the mean: -9/6 = -1.5
This is Antoaneta's z-score.
To find the value of the proportion of exams above the Z-score of −1.5, look at the Z-table.
Z-score −1.5 = 0.0668, the test score is below Antoaneta's score
0.0668, the test score is below Antoaneta's score
If 0.0668 the test score is below the Antoaneta score
→ 1 - 0.668 = 0.9332
Test score 0.9332, meaning that the score is 9.3% higher than Antoaneta’s.
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Please Help! I Have Limited Time!
Maya wrote a few steps to describe how carbon circulates between the atmosphere and living organisms. Step 4 is missing.
Step 1: Carbon enters the atmosphere as carbon dioxide from respiration and combustion
Step 2: Plants use carbon dioxide to make glucose
Step 3: Plant-eating animals consume the glucose present in plants
Step 4:
Which of the following best describes step 4?
A. Carbon dioxide in the atmosphere is used by plants for photosynthesis.
B. Carbon dioxide in the atmosphere is converted into glucose by animals.
C. Dead animals decompose and recycle the carbon in the form of oxygen and water.
D. Dead animals are buried and form fossil fuels, which produce carbon dioxide when burned.
this response of the shoot system benefits the plant by allowing the plant to —
The shoot system benefits the plant by allowing the plant to respond to the sunlight by moving the stem as well as shoot towards the direction of the sunlight.
The plant shoot enables the plant to respond in the presence of a sunlight This sunlight helps to facilitate photosynthesis in the leaves which is found in the secondary stems. Shoot system in the plants consists of a number of different components, which is including; Bud, leaf, node and stem.
Stem is the main support for a plant and node is the attachment point for buds and leaves. Bud is a location of new plant growth and leaf is the main source of the photosynthesis.
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Complete the following sentence.
Farmers are protected from legal suits aimed at limiting their farming practices by various Right to
United States.
laws in all the states of the
Right to farm laws in the United States deny nuisance lawsuits against farmers who use accepted and standard farming practices and have been in prior operation even if these practices harm or bother adjacent property owners or the general public.
Right-to-farm laws
The United States' right to farm rules forbid nuisance lawsuits against farmers who follow established farming practices, even if they cause harm or annoyance to nearby property owners or the general public.
Noise, scents, visual clutter, and hazardous constructions can all be agricultural annoyances.
All 50 states have a Right to Farm law in some form.
Many of these laws were created after 1980 as a result of the decline in farmland availability and challenges posed by private and public nuisance actions that make farming less likely.
The rules are intended to lessen the threat that nuisance lawsuits and burdensome state and local government regulation pose to common farming operations.
Unlike traditional agricultural preservation measures, which are intended to protect farmland itself,
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What causes a sharp stabbing pain in the chest that comes and goes?
Reason of sharp stabbing pain in the chest is high blood pressure, large amount of fatty oil present in our body.
Encountering an irregular horrible pain in the chest can be stressing, however there are numerous potential reasons for this sort of chest torment. Albeit some can be serious and even perilous, others are harmless.
Heart Attack : A respiratory failure is a serious lack or complete blockage of blood stream to the heart muscle. A coronary episode might cause a dull, pounding, or horrible feeling in the chest. The aggravation might happen in the focal point of the chest or just left of the middle.
Heartburn: Indigestion is chest torment that happens when stomach corrosive breaks out of the stomach and back up into the throat (food pipe). The throat is the cylinder that interfaces the mouth and stomach. Individuals commonly experience indigestion as a sharp or consuming torment in the focal point of the chest.
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Imagine we have two of these chambers. In chamber A we turn the carbon dioxide valve all the way up. In chamber B we only provide half as much carbon dioxide as the first chamber. We also make sure to water both plants whenever they appear to be low on water. What do you expect the results of our experiment to be?
A. The plant in Chamber B will grow at a much faster rate than the plant in Chamber A
B. The plant in Chamber A will grow at a much faster rate than the plant in Chamber B
C. The flow of oxygen in Chamber A will be lower than the flow of oxygen in Chamber B
D. The plant in Chamber B will need to be watered more often than the plant in Chamber A
Answer: B
Explanation: Plants need co2 to produce g3p witch is half of a glucose molecule through the Calvin cycle witch is annoyingly complicated so i will not go over it here. But by having more co2 they can produce more food (glucose) and in turn grow faster larger and live longer.
A certain species of bird has a death rate and birth rate that are equal but
the population is experiencing a large amount of emigration. What is
happening to the overall population total?
a. the overall population is increasing
b.the overall population is decreasing
c.there is no change in the overall population
d.there is not enough evidence
A certain species of bird has a death rate and birth rate that are equal but the population is experiencing a large amount of emigration. The overall population is decreasing. In this case, Option B is correct
What occurs to a species when the death rate exceeds the birth rate?
The population of the species will decrease when the death rate exceeds the birth rate. If the difference between the two rates is small, the decline may be gradual; however, if the difference is large, it may be abrupt and severe.
If the population drops too low and cannot recover, this decline, depending on the species and the environment, can result in extinction. Genetic diversity declines along with population decline, making a species more susceptible to disease and climatic changes.
The species may go extinct entirely if the decline persists. In some instances, human activity—such as hunting and habitat destruction—can result in a death rate that is higher than a birth rate.
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Which of the following is the best description of cell division that takes place through the process of meiosis
A. Embryo is growing and developing in the womb
B. A sperm cell and egg cell combine, forming a zygote
C. Humans begin producing sperm
D. Skin cells are constantly being replaced as old ones shed away every day
The best description of cell division that takes place through the process of meiosis is when the humans begin to produce sperms. Thus, the correct option is C.
What is Meiosis?Meiosis is a type of cell division. It is also called as reductional division. Meiosis occurs in the sex cells. These result into production of gametes in the organisms which reproduce through sexual mode of reproduction.
Meiosis is divided into two divisions which are Meiosis I and Meiosis II. These results into four daughter cells which contain haploid or half set of chromosomes in comparison to the parent cells. The gametes produced from meiosis undergo fusion to produce diploid zygote (2n).
Therefore, the correct option is C.
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which of the following countries produces the most greenhouse gasses
According to the latest data from the Global Carbon Atlas, the five countries with the highest total [tex]CO_{2}[/tex] emissions since the Industrial Revolution are the United States, China, Russia, Germany and the United Kingdom.
Carbon dioxide ( [tex]CO_{2}[/tex]) is an odorless gas that is essential to life on earth. [tex]CO_{2}[/tex] is also known as a greenhouse gas. Too high a concentration can disrupt the natural temperature regulation in the atmosphere and lead to global warming.
Concentrations of [tex]CO_{2}[/tex] are increasing, especially as a result of the industrial revolution and the exponential growth of manufacturing activities around the world. Deforestation, agriculture and fossil fuel use are the main sources of [tex]CO_{2}[/tex].
In 2020, the largest emitters were China, the United States, India, Russia and Japan.
How could an increase in mitochondria-rich cells increase energy in a mouse?
Answer:
From birth, the mouse's muscle cells made more mitochondria and burned more fat than the muscle cells of normal mice would. Additional research on mice showed that a drug known as AICAR had the same influence as endurance training.
Answer:
This is pretty simple: mitochondria are the powerhouse of the cell, so as soon as you add more, there is more energy.
Construct a dichotomous key to classifying classes of invertebrates without jointed legs : annelids , molluscs , cnidarians , sponges , echinoderms , nematodes , flatworm
The animals which come under invertebrates without jointed legs are mollusks, sponges, echinoderms, nematodes, and flatworms.
What is a dichotomous key?A dichotomous key is a useful scientific tool for identifying various organisms based on their observable characteristics. Dichotomous keys are made up of a series of statements, each with two options, that guide users to the proper identification.
To construct a dichotomous key:
Step 1: Make a list of the attributes.Step 2: Arrange the features in ascending order.Step 3: Separate the specimens.Step 4: Subdivide the specimen even more.Step 5: Produce a dichotomous key diagram.Step 6: Put it to the test.Therefore, mollusks, sponges, echinoderms, nematodes, and flatworms are examples of invertebrates with unjointed legs.
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What is the complementary strand for this DNA strand Gacctaagcg?
The complementary strand for this DNA strand GACCTAAGCG is CTGGATTCGC.
Deoxyribonucleic acid, also known as DNA, is a component of all living things and serves as their genetic blueprint. The four chemical bases Adenine (A), Guanine (G), Cytosine (C), and Thymine (T) make up the code that the DNA uses to store information (T).
The information that can be used to create and maintain an organism is determined by the arrangement and sequence of these bases. Only because the two strands of DNA are antiparallel is it possible for amino and carbonyl groups of complementary base pairs. A pairs with T and G pairs with C to form hydrogen bonds.
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Why is mitosis crucial life?
Mitosis is crucial for life as it replaces the worn out cells in the body and provides new cells for growth.
Mitosis is basically a kind of cell division which involves one cell, the mother cell, divides in order to produce two new cells which are known as the daughters cells which are genetically identical to itself. When we look at the cell cycle, mitosis is the part of the process of division in which the DNA present in the cell's nucleus is split to form two equal sets of chromosomes.
Since mitosis allows the DNA to split into two equal sets, it helps in ensuring equal division of chromosomes during the formation of daughter cells. The cells in the body get worn out and are replaced by the help of mitosis division. Mitosis results in the formation of two new daughter cells and hence provides new cells for growth.
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