Final answer:
Natural selection occurs when there is a variation of traits, the heritability of these traits, competition for limited resources, and differential survival and reproduction (fitness) which leads to evolutionary changes in a population.
Explanation:
To understand Darwin's theory of natural selection and what must be occurring in a population for it to take place, we must consider Darwin's four postulates. These factors are essential for the mechanism of evolution through natural selection.
Variation of traits among individuals in a population. This genetic variation is crucial because, without it, there would be no differences upon which natural selection could act.These variations must be heritable, meaning that they can be passed down through generations. This allows for the favorable traits to be accumulated over time.There must be competition for resources. Since resources are limited, not all individuals can survive and reproduce, leading to a 'struggle for existence.'Individuals with traits that give them an advantage in their environment are more likely to survive and reproduce. This differential survival and reproduction is known as fitness, and over time, this can lead to changes in the population.These principles form the basis of Darwin's theory of natural selection, illustrating how populations change over time and how new species can evolve.
Percentage of
Trees Remaining
2010
2015
2020
2025
2030
2035
Year
What would a graph of oxygen production look like for this forested area?
O
A. Aline that is increasing
O
B. A line that is decreasing
O
C. A line that is leveling out
O
D. A line that is slowly rising
Answer:
Percentage of
Trees Remaining
2010
2015
2020
2025
2030
2035
Year
What would a graph of oxygen production look like for this forested area?
A line that is increasing
Explanation:
It is an established fact by scientist that availability of trees increases oxygen rate in an environment. From the above question, the increase in number of trees as allotted by increase in years reflect an increase in oxygen available. Trees makes use of carbondioxide exhale by humans while humans make use of oxygen exhale by trees.
An octopus reproduces only once in its life, but it may have more than 100,000 offspring, depending on the species. Certain species of penguin, by contrast, have only one chick at a time. If some species can reproduce as rapidly as the octopus (100,000 offspring every 3 or 4 years), how is it possible that a species that has only one young at a time is equally successful?
A.
Having a large number of offspring assures that at least some of them will escape being killed by predators.
B.
An octopus only reproduces one time, but penguins may reproduce between 4 and 12 times in their lives.
C.
Baby penguins are left to fend for themselves from the time they hatch, so they quickly become self-sufficient.
D.
The success of a species depends on the number of offspring that survive long enough to reproduce.
Answer:B
Explanation:
An octopus only reproduces one time, but penguins may reproduce between 4 and 12 times in their lives.
C.
Baby penguins are left to fend for themselves from the time they hatch, so they quickly become self-sufficient.
D.
The success of a species depends on the number of offspring that survive long enough to reproduce.
Answer:
D
Explanation:
I got this exact same question on Study Island.
"The success of a species depends on the number of offspring that survive long enough to reproduce, not just the number of offspring produced at a time or even in a lifetime. A penguin who has only one young can devote a lot of time, attention, and care to it, greatly increasing its chances of surviving long enough for it, too, to reproduce. An octopus, on the other hand, usually dies shortly after reproducing. A young octopus has no parent to protect or teach it, so the vast majority of octopi do not survive long enough to reproduce." -Study Island
Hope this helps :D
Lucy plans to buy a refrigerator. She wants a large model so it has enough space for all the food she needs to store so that she takes fewer trips to the grocery store. Lucy also wants a refrigerator that does not use too much electricity. However, when she goes to the appliance store, she finds that larger refrigerators use more energy. Which statement best explains why there is NO perfect solution for Lucy's
a. Lucy cannot choose the values of the variables.
b. The two variables have to be calculated.
c. There is a trade-off between the two variables.
d. Lucy does not know which variable is more important.
Answer:
D) there is a trade of between the two variables
Explanation:
this makes more sense
we cannot see properly when we come out in dark room from a bright place . why
Answer:
Because it takes some time to adapt to the new level of light in the environment
Explanation:
The pupil of our eye functions to control the light that enters our eye by contracting or relaxing.When we are in bright place, the pupil contracts to limit the light in our eye lens. When we move to a dark room, the pupil takes some time to expand and due to this only limited amount of light enters our eye lens which might not be enough to see properly in the dark place. Unlike human beings some animals have more effective pupil with which they can stalk their prey in low light too.Our inability to see when moving from a bright place to a dark room is due to the time it takes for our eyes to adjust from cone to rod activity, which is better suited for low-light conditions. This adjustment process leads to a temporary period of impaired vision known as dark adaptation.
We cannot see properly when we come out of a bright room into a dark one because our eyes need time to adjust to the lower levels of light. In a bright environment, our vision is dominated by cone activity, providing us with color vision and sharpness of sight. When we move into a darker environment, our eyes gradually switch to relying more on rod activity.
Rods are more sensitive to light but provide no color information and are more effective in low light. The transition from a well-lit area where cones are active, into a dark area where rods become more active, takes time, causing a temporary inability to see in the dark. This also explains why animals like owls and bats can see in what appears to be pitch darkness to us; their eyes are either more sensitive to light or adapted to different wavelengths, allowing them to see with less light than humans require.
Ultimately, what is experienced as 'darkness' is a limitation within our own visual system rather than a complete absence of light. With time, our eyes adapt, and we begin to see better in the dark theater or room, though it may never appear as bright to us as the outside because our perception of brightness is not directly proportional to the number of photons received.
an equation that shows how an objects acceleration relates to its mass
Answer:
the wieght
Explanation:
Answer:
a = f (net) / m
Explanation:
a = f (net) / m, where a = acceleration, f (net) = the net force acting on the object, m = the mass of the object.
the difference of the biomes of Kansas city and denver
Answer:
Answer: If you compare them, Denver has a much colder climate
Explanation:
Explanation:
Cross a bay stallion with a cream mare. List all offspring phenotypes as a percentage
Answer:
buckskin(The horse has a tan or gold colored coat with black points (mane, tail, and lower legs))palomino(gold coat and white mane and tail, the degree of whiteness can vary from bright white to yellow)smoky black(coat is either black or a few shades lighter than true black)Explanation:
A bay horse is a black-based animal with the agouti gene, which is the modifier that limits the horse’s black color to its points (legs, mane, tail, eartips). The black-based horse can be either homozygous for the extension allele (two copies black – EE) or heterozygous (one copy black, one copy red – Ee). Because black is dominant, an Ee horse will appear black-based.
A horse can carry the agouti gene whether it is black or red (this is why a black horse bred to a chestnut or sorrel horse may produce a bay). It is impossible to tell phenotypically (from looking at the horse) if it is homozygous or heterozygous.
This means that when you cross a cremello (a sorrel/chestnut with two copies of the cream gene) on a bay (black with agouti), you can get buckskin, palomino or smoky black, depending on the horses’ exact gene combination.
references:
wikipedia.comAnswer:
buckskin(The horse has a tan or gold colored coat with black points (mane, tail, and lower legs))
palomino(gold coat and white mane and tail, the degree of whiteness can vary from bright white to yellow)
smoky black(coat is either black or a few shades lighter than true black)
Explanation:
15. How can molecular clock data help us in the battle against infectious disease?
Meus
Answer:
Molecular clock can be described as a technique which scientists use for determining when two life forms might have diverged based on the mutation rate which occurs in biomolecules.
Molecular clocks can be used against infectious diseases because the infection causing agents such as bacteria or viruses contain DNA and RNA. Mutations constantly arise in these infectious agents at the time of their replication. Molecular clocks can help us to sequence different infections and check how similar and different they are to each other. Based on the similarities and differences we can determine the time of the disease and its treatment.
These are the 13 different species of birds that are related in the Galapagos islands
Answer:
Darwin's finches
Explanation:
Darwin's finches are the 13 different species of bird which he observed on the Galapagos island during his voyage on the H.M.S Beagle. The study of these finches helped Darwin to propose the phenomenon of natural selection. According to Darwin, the 13 different types of finches arose because of the different modes of nutrition for the birds located on each island. Through natural selection, those traits evolved which made the species more adaptable to live on the particular island
which activity might a scientist do as part of the scientific process? apex
A.) Make a testable hypothesis
B.) Hide experimental data
C.) Make unsupported claims
D.) Answer ethical questions
Lack of interaction with social and cultural environments transforms people into members of society.
Please select the best answer from the choices provided
OT
OF
Lack of interaction with social and cultural environments transforms people into members of society is a false statement.
Explanation:
Socialization which involves social interaction of people with each other will help transform themselves into active members of society.
The way we interact and project ourselves to our friends, relatives, parents, teachers, colleagues, neighbors and others grades our socialization process.
Knowing about the social and cultural environment of society and interacting with others based on that knowledge will help an individual to interact closely with other people and hence will transform to being a member of that society.
People who are less or unsocialized, self-interested shows a lack of interest in knowing the social and cultural environment of others and hence would not be successful in socializing.
Socialization process helps to change the status of an individual from “I” to “me”. The “me” part understands the values, expectations, and rules of a society and hence interacts socially to become a member of society.
List 3 imperfections of the vertebrate eye?
Answer:
Favors random changes (retinal tear)/ nerve cells in front of retina
Explanation:
i could only say 2 i dont know the other one.
Final answer:
Three imperfections of the vertebrate eye include the presence of a blind spot, variability in visual acuity and sensitivity among different species, and astigmatism as a vision defect.
Explanation:
Three imperfections of the vertebrate eye are the presence of a blind spot, variability in visual acuity and sensitivity among different species, and the occurrence of astigmatism as a vision defect.
The blind spot is caused by the positioning of nerve cells and blood vessels in front of the light-sensitive cells of the retina. This design flaw is a result of the evolutionary path that led to the vertebrate eye.
Visual acuity and sensitivity differ among species based on their ecological niches. For example, eagles have a higher visual acuity than humans due to their specialized life-style.
Astigmatism is an unevenness or asymmetry in the focus of the eye, resulting in elongated or blurry images. It can be caused by irregularities in the cornea, lens, or retina.
Which state of a dead body is caused by the lack of adenosine triphosphate (ATP) to the muscles?
Answer:
the elipsophre state
Explanation:
this is when the muscles and skine start to spoil
A biologist conducted an experiment to determine the rate at which DNA mutations occur. The biologist was careful to record the steps of her experiment, as well as her observations and results. What should the biologist do next?
A.
Report her results in a scientific journal.
B.
Ask the local newspaper to publish her results.
C.
Hide her results from other scientists so that they won't steal her idea.
D.
Come up with a new hypothesis that she can test.
A. Report her results in a scientific journal - should be the action that the biologist should do next
Explanation:
Once conducting an experiment a biologist or a scientist should record the values, observations and inferences correctly because science requires construction of all data, facts, values, explanations, observations, and predictions that are observed and evidenced.
Research findings are published in a scientific journal because the research findings are stored, saved and can easily be referred for future reference.
This will be evaluated by other academicians and scientists and can be compared with past results to value the achievements made by the current researcher. This will also give way for future prospects in the research.
This will add academic credibility to both the biologist and her institute. When presented in a literature form, this can be accessed by scientists, academicians, peers and others to refer and cite valuable information in their research.
Others can use the findings to help with advancements of the research in the same topic. It gives an immense feeling for the biologist or any researcher to see his/her work being published on a recognized journal and will encourage to work more.
What product produced by yeast cells during fermentation causes bread to rise?
lactic acid
carbon dioxide
glucose
ethyl alcohol
Answer:
answer is carbon dioxide its correct
Answer:
carbon dioxide
Explanation:
Water vapor will change state from
energy has been removed,
__to
a t 100 °C when heat
OA) solid; gas
OB) gas; solid
O C) gas; liquid
OD) liquid; gas
Answer: C) gas; liquid
Explanation: There are three states of matter: solid, liquid and gas. Water can exist in these three states. Water is a liquid but when heat energy is applied to it, the temperature rises until it reaches its boiling point where it begins to boil and as water boils, it changes to gaseous state i.e., it turns to vapor. When heat is removed, the temperature decreases and the vapor condenses to liquid and if the heat removal continues, the temperature continues to drop until it reaches its freezing temperature (0°C) where it changes from the liquid to ice (the solid state).
4 While surveying his apple trees, a farmer discovers a particular tree that produces apples with perfect size, color, and flavor. To reproduce this plant, he removes a twig from the tree and attaches it to the stem and root system of a growing apple tree in a process called grafting. The tree will continue to grow and will later produce apples. Why does he use this method instead of planting an apple seed from the tree with ideal apples? A.
The twig contains the genetic material of the parent tree and will eventually produce identical apples.
B.
The apple seed will grow into a tree that is not identical to the parent tree.
C.
The apple seed contains a mixture of genetic material from two trees.
D.
all of these This is on study island
Answer:
I think it is C
Explanation:
Hope it helps
Which measures the amount of kinetic energy of the particles that make up
a substance?
OA) mass
OB) volume
OC) distance
OD) temperature
Answer
Tempature
Explanation:
Answer: D) temperature
Explanation: Kinetic energy is the energy of a moving particle or body. When the temperature of a substance is increased, the particles of the substances gain kinetic energy, and when the temperature decreases the kinetic energy decreases. When the temperature of a substance is zero, the kinetic energy of the particles is zero. For example, when heat is applied to water, its temperature increases, and the kinetic energy of the particles begin to increase. If the heat persists, the temperature continues to increase and kinetic energy of the water particles continues to increase and the particles begin to move in a random manner, colliding with one another and the walls of their container until a point where the water begins to boil. When the heat is removed, the temperature decreases and the kinetic energy of the water particles decreases until the water cools.
Language: English Español
MEIOSIS
Meiotic
Division 1
DNA
Replication
and Recombination
Cell
Division 1
Meiotic
Division 2
00:00:43
Cell
Division 2
OD ODS
ÓÓÓÓ
At the end of meiosis II, how does the DNA in each of the four new cells compare to the DNA from the original cell?
Answer:
Meiosis is known as the reduction division. It produces four haploid (n) gametes containing only one chromatid from each chromosome. Therefore, at the end of meiosis 2, the number of chromosomes is half that of the original cell.
Explanation:
Following is a summary of the events of meiosis:
Interphase:
Prepares the cell for division. Duplication of DNA, duplication of centrioles occurs and the cell grows in size. At this stage the cell is diploid (2n).
Prophase 1:
First stage of Meiosis 1.The centrioles move to the poles of the cell, the nuclear membrane disintegrates, homologous chromosomes pair up (in the form of tetrad), form a chiasmata and then exchange segments of chromosomes with each other. This process is called crossing over.
Metaphase 1:
Involves the arrangement of the crossed over, homologous chromosomes on the metaphase plate which is sort of like a web of spindle fibers that originates from the centrioles.
Anaphase 1:
The tetrads arranged on the metaphase plate are pulled apart by the spindle fibers. This is the result of tension that build up in the spindle fibers as they grow towards opposite poles.
Telophase 1:
The last stage of meiosis 1. Involves the arrival of the chromosomes at the poles, the nuclear membrane starts to form and the chromosomes start decondensing. Telophase 1 yields 2 daughter cells with half the number of chromosomes as that in the parent cell.
Meiosis 2:
Meiosis 2 is exactly similar to mitosis. The only difference is that the haploid cells entering meiosis 2 do not duplicate their DNA. Meiosis 2 just involves the separation of the sister chromatids of homologous chromosomes.
As mentioned above, interphase does not occur before meiosis 2.
Prophase 2 involves the disintegration of nuclear envelope, centrosomes start moving to the poles.
Metaphase 2 arranges the chromosomes on metaphase plate.
Anaphase 2 separates the sister chromatids from the chromosomes.
Telophase 2 develops the nuclear envelope and separates the nuclei of the daughter cells into 2. Nuclear division id followed by cytokinesis (division of cytoplasm). Telophase 2 result sin 4 haploid daughter cells with one chromatid from each chromosome.
Hermione's possible genotypes are MMss or MM'ss. What are possible genotypes of Hermione's parents who are muggles?
MM'Ss or MMSs are the possible genotype of Hermione's parents.
Explanation:
Muggles have a gene for magic but not expressed in them, S represents silencing, s is no silencing).
If Hermione's genotype is MMss or MM'ss
then Hermione's parents would have Ss (but did not express S in Hermione and parents were heterozygous)
Hermione's parents could have M' M alleles but M' could or could not have appear in this case
so parents genotype are
MM'Ss or MMSs
It can be checked by crossing the possible genotype of parents
M M' s S
M MM MM' s ss Ss thus Hermione has this possible combination
M MM MM' S Ss SS as MMss , MM'ss
Which aspect of this source should make the reader question its credibility?
A. It is not written by an authority.
B. It is not published in a major city.
C. It was not written recently.
D. It is a peer-reviewed journal.
Answer:
The correct option is A) It is not written by an authority
Explanation:
In the English language, credibility can be described as the quality of an object to be reliable or trusted.
A piece of written work which does not mention the name of the writer may be considered to be not reliable and trustworthy. Hence, the correct option is A.
Other options, like option D, is not correct because a peer- reviewed journal carries authentic information as the work has been rechecked by different people who have expertise on the subject.
How did people acquired immunity to a disease before the development of vaccines
Answer:
Exposure to the disease
Explanation:
Before vaccines, the only way to develop immunity to a disease was to be exposed to the disease-causing pathogen without being harmed by it. A good example of this is smallpox, which was also the first vaccine developed. It was noticed that milk maids weren't catching and dying from small pox like everyone else, because they had been exposed to cowpox. This premise was used to create the first vaccine.
Vaccines give you immunity by injecting you with a small amount of a (usually inactive) pathogen. inside your body. This means your immune system produces antibodies against it. Similar to what happened with the milkmaids.
Identify one abiotic factor in the diagram that functions as a limiting factor for the autotrophs in this ecosystem and explain why it would be considered a limiting factor
Abiotic factors in an ecosystem comprise the non-living components, such as sunlight, that might limit the growth of autotrophs by restricting the capabilities for photosynthesis. Autotrophs are self-sustaining organisms that need sunlight to manufacture their own food. Insufficient sunlight, therefore, becomes a limiting factor for these organisms and affects the entire ecosystem.
Explanation:In the context of an ecosystem, an abiotic factor refers to all of the non-living physical and chemical factors that influence the distribution and abundance of organisms. A limiting abiotic factor for autotrophs (organisms that can produce their own food from inorganic substances) in this ecosystem could be sunlight. Sunlight can be considered a limiting factor because it is necessary for photosynthesis, the process by which autotrophs produce their own food. If the sunlight is insufficient, it limits the growth and productivity of autotrophs, thereby influencing the entire ecosystem.
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Final answer:
Sunlight is an abiotic limiting factor for autotrophs in an ecosystem because it is essential for photosynthesis, affecting their growth and the entire food chain.
Explanation:
One abiotic factor that functions as a limiting factor for the autotrophs in an ecosystem is sunlight. Sunlight is considered a limiting factor because plants and other photosynthetic organisms require it for photosynthesis, which is fundamental to their energy production and growth. Without sufficient sunlight, these autotrophs cannot produce enough energy to sustain their metabolic processes, grow, and reproduce. This limitation can affect the entire food chain since autotrophs serve as the primary producers and form the base of the ecosystem's energy pyramid.
2. Which of the following is a heterotroph?
a. Dirt
b. Pumpkin
c. Cat
d. Flower
Answer: c) Cat
Explanation:
A heterotroph is an organism which depends on plants or other animals for food because it cannot manufacture its own food. All animals are heterotrophs while green plants are autotrophs because they can manufacture their own food using chlorophyll in a process known as photosynthesis. Heterotrophs feed on complex organic food materials.
Explain why a rock pocket mouse color influence its overall fitness. Remember that "fitness" is defined by an organisms ability to survive and produce offspring in its environment
Answer:
The rock pocket mice rely on their fur color for camouflage. So, on the tan sand more light colored mice will survive because they blend in and on the dark lava rock more dark colored mice will survive and the allele for dark fur will be passed on to their offspring
Owing to the definition of fitness as being an organism's ability to survive in an environment, the fact that the color of pocket mouse aligns or blends with the color of their niche protects them from predation.
Rock pocket mouse lives in environments which conceals their presence. This is achieved by staying in areas where their fur color blends with the habitat. Hence, concealing their existence or presence. Light colored pocket mouse lives on light colored rocks while dark colored species lives on dark lavas. This keeps them safe from predators.Therefore, pocket mouse select their living area based on their color in other to conceal their presence and keep them safe, hence, increasing their fitness level.
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using the development of reflecting telescopes as an example , explain how scientific inquiry leads to advances in technology
Answer:
A scientific inquiry can be described as the different ways in which scientists tend to study about the phenomenons occurring in the natural world.
To make advances in scientific inquiries, scientists have to come forward with better technologies than the past to get a better understanding of the events occurring in the natural world.
For example, the telescope was the technology designed by Galileo in 1609 for astronomical observations. The reflecting telescope was designed by Newton in 1668 which was far better than Galileo's telescope and could make better observations.
The development of reflecting telescopes, initially driven by the need for more accurate astronomical observations, showcases how scientific inquiry spurs technological advances.
The development of reflecting telescopes is a prime example of how scientific inquiry leads to technological advances.Reflecting telescopes, which use mirrors to gather and focus light, were developed to overcome the limitations of earlier refracting telescopes, which suffered from chromatic aberration.This advancement in telescope design was driven by the need for clearer and more accurate astronomical observations.Early scientists, such as Isaac Newton, applied principles of optics to develop the first reflecting telescopes in the 17th century.This improved technology allowed astronomers to observe celestial objects with unprecedented clarity and detail, leading to new discoveries about the universe.Over time, further improvements in materials and engineering enabled the construction of even larger and more powerful telescopes, such as the Hubble Space Telescope, which has vastly expanded our understanding of the cosmos.The process exemplifies how new technologies can provide researchers with better tools for observation, subsequently leading to new evidence and the revision of existing scientific theories. As each technological enhancement opens new avenues for exploration, it propels science forward, perpetually fostering discovery and innovation.compare a cat arm to a human arm in form
Explanation:
The difference between the human hand and that of the cat are uses of the appendage and the size and number of certain bones. The human arm is used for a variety of functions while the lizard's and the cat's are used for walking an climbing,
Final answer:
The human arm and the cat's forelimb share a similar bone structure with a humerus, radius, and ulna, pointing to a common evolutionary ancestor. Their functions differ, with human arms optimized for manipulation and cat forelimbs for locomotion.
Explanation:
Comparing the forelimbs of a cat to the human arm reveals significant anatomical similarities. Both contain a single upper bone known as the humerus, and two lower bones, the radius and ulna. Additionally, both limbs include carpals (wrist bones), metacarpals (hand bones in humans, paw bones in cats), and phalanges (fingers in humans, toes in cats). These structural similarities point to a common evolutionary ancestor. However, the functions of these limbs differ; the human arm is adapted primarily for manipulation and complex movements, while the cat's forelimb is adapted for walking, running, and climbing.
The bones of mammals like humans, cats, and whales all follow this basic design, indicating homologous structures that have evolved over time to perform different functions in different species. For example, the human arm is used for throwing, whereas the cat's forelimb is for locomotion, and the whale's flipper is for swimming. The construction of these body parts is controlled by Hox cluster genes, further underscoring their shared biological heritage.
the diagram above shows a process that can occur during meiosis
the moat likely result of this process is...
A.) a new combination of inherited traits that can appear in The Offspring
B.) A increase in the chromosome number of the organism in which this process occurs
c.) an inability to pass either of these chromosomes onto The Offspring
d.)A loss of genetic information that will produce a genetic disorder in The Offspring.
Answer:
The correct option is A) a new combination of inherited traits that can appear in the offspring
Explanation:
Meiosis can be described as a type of cell division which occurs in the sex cells only. This kind of division causes the chromosome number to be reduced to half of that of the parent cell. This happens so that the chromosome number can be maintained in a fertilized zygote.
The phenomenon shown in the picture is of crossing over. Crossing over is the process by which homologous chromosomes exchange DNA segments so that genetic variation can occur among the parents and offspring.
The correct option is A) a new combination of inherited traits that can appear in the offspring
The following information should be considered:
Meiosis could be represent the cell division type that arise in the sex cells only. It caused the chromosome number for decreasing to half of the parent cell. The chromosome number could be maintained in the fertilized zygote.
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In areas where kelp is abundant, sea urchins can be found. If sea otters live in the same ecosystem as the sea urchins, the equilibrium of the kelp forest can be maintained. Based on the food chain, how is the kelp equilibrium MOST likely maintained?
Answer:
There needs to be enough sea urchins for otters to come and there needs to be enough otters to eat the urchins.
Explanation:
What is the name of the process where DNA is
duplicated to create two strands of DNA?
This process is called DNA Replication. Replication is essential/needed with DNA and when the cell divides into two parts, the two daughter cells have to have the same genetic information. Replication is needed for this genetic information to be copied.
- CloutAnswers
The duplication of DNA to produce two identical DNA strands is known as semiconservative DNA replication, where each new molecule contains one parental strand and one new strand.
Explanation:The process where DNA is duplicated to create two strands of DNA is known as DNA replication. This is a semiconservative process, which means one strand from the original DNA molecule is conserved, or kept the same, in each of the two new DNA molecules. During semiconservative replication, an enzyme called DNA helicase breaks the hydrogen bonds between complementary bases, unfolding the double helix. Then, DNA polymerase reads the existing strands and adds new nucleotides to form complementary strands. The resulting two daughter DNA molecules, therefore, consist of one old parental strand and one new strand, preserving half of the original DNA molecule in each.
This complex process occurs during the synthesis phase of the eukaryotic cell cycle, ensuring that each new cell receives an exact copy of the DNA. DNA replication is also considered an anabolic process because it involves the synthesis of new molecules.