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.
Why is the mixing of fresh water and salt water in the bay important?
Answer:
When the salt water is mixed with fresh water,it is called brakish water which have the salinity 0.5 to 35 ppt.
Explanation:
The mixing of fresh and salt water is important for aquatic organisms.
The catadromous fish born in marine habitat but they spend their rest of life in the fresh water where growing and maturation takes place.
Ex- Eel is the common example of catadromous fish.
Like wise,
Anadromous fish born in fresh water and spends their life in the sea and return to fresh water for spawning.
For example Salmon, smelt, shad, are common examples.
Thus mixing of water is important for breeding and growing of these fishes.
More over, the brakish water contain world's most diversified life forms.
The mixing of fresh water and salt water in estuaries results in a brackish environment that is vital for many species' life cycles and contributes to a diversity of plant and animal adaptations. These areas are crucial for the ecological health of marine life.
The mixing of fresh water and salt water in estuaries is crucial because it creates a unique environment known as brackish water, which supports a diverse ecosystem. This mixture forms estuaries, biomes characterized by a gradient of salinity levels, which serve as essential nurseries for the young of many species such as crustaceans, mollusks, and fish. Estuarine environments also foster a range of adaptations in plant and animal species, enabling them to survive in varying salinity conditions. For instance, halophytic plants have evolved mechanisms to tolerate saline conditions, either by filtering salt through their roots or by pumping oxygen into their root systems to combat the low oxygen environment caused by higher salinity levels. Animals, such as mussels and clams, have developed behavioral adaptations to cope with the changing salinity, alternating between aerobic and anaerobic respiration as tides change, indicating a rapid physiological challenge these creatures face in their habitat. The tidal actions mix and redistribute the salinity in the estuaries, affecting biodiversity and the health of the ecosystems.
If one has 24 kg of Polonium and it undergoes two half-lives, how much do you have left?
A) 12 kg
B) 3 kg
C) 6 kg
D) 2 kg
What needed to happen before life could exist on Earth?
Answer:
The condition of the Earth had to become favourable before it could support any form of life.
The formation of the different layers around the earth like the ozone layer was necessary before life could originate. Primitive species such as some prokaryotes were able to live in hydrothermal conditions during the initial times. With the passage of time, as the concentration of oxygen increased due to photosynthetic prokaryotes, situations became favourable for eukaryotic organisms to arise.
what happened on march 22 2010
Answer: James W. Black, Scottish Nobel Prize-winning doctor and medical research scientist had died that day
if two wave crests overlap each other and one has an amplitude of 5 and the other has an amplitude of 3 what is the interference.
Explanation:
When two crests overlap, this is a constructive wave interference. This is positive wave interference involving addition of both amplitudes – whether it's two crests or two troughs of the wave. Therefore in this case;
5 + 3
= 8
The resulting wave will have a crest with an amplitude of 8 at the point of interference.
Destructive wave interference occurs when a crest meets a trough. This kind of interference involves the subtraction of the amplitudes of the two.
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Answer:
8
Explanation:
2.The new codon that you answered for #1 codes for which amino acid? Only give the three letter prefix for your answer.
3.This type of mutation is called a __________ mutation when there is a simple change in one base of the gene sequence.
Ex:
Original:
The fat cat ate the wee rat.
Mutation:
The fat hat ate the wee rat.
4.Did this mutation have an effect on the outcome compared to the normal sequence?
Explanation:
Question 2 is incomplete.
3. A mutation that only affects a single nucleotide of nucleic acid is known as Point Mutation.
In Point mutations there is substitution of one base for another.
Example: TAT TGG CTA
TAC TGG CTA
The TAT changes to TAC which shows point mutation.
4. Yes. The point mutation have an effect on the outcome compared to the normal sequence.
When there is a change in one base of the gene it results into causing disease such as cancer, sickle cell anemia.
A silent mutation is a mutation where the new codon codes for the same amino acid as the original codon. A point mutation is a type of mutation that involves a simple change in one base of the gene sequence. The mutation in the given sequence is a point mutation where the base 'c' in the codon 'cat' was changed to 'h' in the codon 'hat'. The effect of this mutation on the outcome depends on the context and purpose of the sequence.
Explanation:The new codon that codes for the same amino acid as the original codon is called a silent mutation. For example, if the original codon is AAA for lysine, and it is mutated to AGA for arginine, both amino acids are basic amino acids and the protein may not be affected. It is important to note that a change in the third base of the codon, called the wobble base, may still permit the correct incorporation of the same amino acid into the protein.
A point mutation is a type of mutation that involves a simple change in one base of the gene sequence. This can include silent mutations, missense mutations (where the codon codes for a different amino acid), or nonsense mutations (where the codon becomes a stop codon).
Based on the given information, the mutation in the sequence "The fat hat ate the wee rat" compared to the normal sequence "The fat cat ate the wee rat" is a point mutation where the base "c" in the codon "cat" was changed to "h" in the codon "hat".
Five different students in Mr. Garcia's class have done an experiment once, and each one got similar results. What should the students do to increase the validity of their results?
A. Each student should do a few more experimental trials.
B. The students should ask Mr. Garcia for a different experiment to do.
C. The students should compare their procedures and try to revise them.
D. Each student should modify the experiment and see what results they get.
To increase the validity of the results, all the students of Mr. Gracia's class must perform a few more experimental trials.
Answer: Option A
Explanation:
While dealing with the scientific analysis, one must always commit number of experiments to gain the most accurate and valid result. By doing number of trials, we get different approximate values that can be used to estimate the average result.
This average will be the nearest value of the exact answer if we add more and more number of experiments or trials. Since, the results are similar for each student in the class, they all should attempt more trials or experiments to get the most accurate result.
To enhance the validity of their results, the students should conduct additional experimental trials, as repetition increases reliability and helps identify possible experimental errors. The correct answer is option (A).
To increase the validity of their experimental results, it is essential for the students in Mr. Garcia's class to perform more experimental trials. This process, known as repetition, helps to ensure that the results are repeatable and reliable. Adding more trials would strengthen the evidence that the initial outcomes were not due to random chance or experimental error.
Discussing potential opportunities for experimental error and the controls that could be added to reduce such error would also help in refining the experiment and increasing the validity of the results. Each student conducting more trials would provide a larger data set, making it easier to identify any anomalies or consistent patterns within the results.
Thus, the correct answer to the student's question is option A) Each student should do a few more experimental trials.
Which is true of sex-linked genes
Answer:
"They may be on one sex chromosome and not the other" is true of sex-linked genes.
Explanation:
Gender related is a function in which a gene is found on a sex chromosome. It is because the X chromosome is wide and includes a lot more genes than the shorter Y chromosome. In a sex-linked disorder, males are typically affected, because they have a single xerox of the X chromosome that contains the mutation. Prominent examples of sex-related genes in human beings are those that code for colorblindness, or those that code for hemophilia i.e incapacity to make blood clots.
i need a list of biotic factor listed from A to Z
Answer:
~Producers
~Consumers
~Predators
Explanation:
Biotic factors(biotic components): It can simply be defined or described as any living components that affect another organism or shape the ecosystem. These includes both animals that consume other organism within there ecosystem, and the organism that is being consumed. These biotic factors are categorized in three place as enlisted above.
The:
Producers (Autotrophs).
Consumers (Deterotroph)
Decomposers( Detritivores).
did gene present in human body with out phenotype
Answer: depends on the gene you’re referring to. There are genes that do not present with a phenotype.
Phenotype is an observable characteristic. There are many genes that do not have an effect on physical characteristics.
Explanation:
Answer:
did gene present in human body with out phenotype?
No, it is not found in human body
Explanation:
Phenotype is only expressed physically through characteristics such as color, height, among others.
What statement would be true according to the theory of blending inheritance?
a. The offspring of a parent plant with yellow seeds and a parent plant with green seeds will either have yellow or green seeds.
b. The offspring of a parent plant with round seeds and a parent plant with wrinkled seeds will have seeds both round and wrinkled.
c. The offspring of a tall parent plant and a short parent plant will all have a height in the middle.
d. The offspring of a parent plant with purple flowers and a parent plant with white flowers will all have purple flowers.
The correct option is (b). The offspring of a parent plant with round seeds and a parent plant with wrinkled seeds will have seeds both round and wrinkled.
According to the theory of blending inheritance, the traits of the offspring are a blend of the traits of the parents. This theory was proposed by Charles Darwin and was one of the early models attempting to explain the inheritance of traits.
Let's examine the options based on this theory:
a. The offspring of a parent plant with yellow seeds and a parent plant with green seeds will either have yellow or green seeds. This statement is not consistent with blending inheritance, which would predict that the offspring would have a seed colour that is a blend of yellow and green, such as a pale yellow or a yellowish-green.
b. The offspring of a parent plant with round seeds and a parent plant with wrinkled seeds will have seeds both round and wrinkled. This statement is consistent with blending inheritance, as the seeds of the offspring would be expected to exhibit a phenotype that is intermediate between round and wrinkled, possibly being less round or slightly wrinkled.
c. The offspring of a tall parent plant and a short parent plant will all have a height in the middle. This statement is consistent with blending inheritance, which would predict that the offspring's height would be an average of the parents' heights. However, this is not a definitive statement about the theory, as it does not necessarily apply to continuous traits like height in a straightforward blending manner.
d. The offspring of a parent plant with purple flowers and a parent plant with white flowers will all have purple flowers. This statement is not consistent with blending inheritance, which would predict that the offspring would have a flower colour that is a blend of purple and white, such as lilac or pale purple.
Therefore, the only statement that correctly reflects the predictions of blending inheritance is option b.
What sort of information can you get from a body fossil that you can’t get from a trace fossil?
Things like bones, teeth, shells, and leaves are considered body fossils. Trace fossils give us proof of animal life from the past. Trace fossils include things like foot prints, burrows, and fossilized poop. i dont know if this will help but it might
Describing motion:
Motion (blank) is
which means it
can only be
described in
relation to another
object
(my teacher makes no sense. Help.)
Answer:
Motion: When a person changes its position with respect to its surroundings is called motion.
In motion, when a body moves from one place to another place, the body goes farther from one thing and go nearer to another thing.
For example, if a person went to office from home, when it moves the person goes nearer to the office and far away from the home.
Types of motion :
1) Translational motion
2) Rotational motion
3) Vibrational motion
What will happen to the species in this ecosystem if the water temperature increases close to the warmest temperature shown on the diagram?
The species will either adapt, migrate, or continue the circle of life.
Answer:
Species B will survive and Species A will die out
Explanation:
I just got it right
In nitrogen fixation, the plant obtains the nitrogen it needs to synthesize proteins, while the bacteria obtain carbon from the plant and a secure environment to inhabit within the plant roots. Which statement best explains the symbiotic relationship between the plants and the bacteria? A) Both the plants and the bacteria benefit from the process of nitrogen fixation, showing commensalism. B) The plants benefit and the bacteria are unaffected by the process of nitrogen fixation, showing commensalism. C) Both the plants and the bacteria benefit from the process of nitrogen fixation, making it a mutualistic relationship. D) The bacteria benefit and the plants are unaffected by the process of nitrogen fixation making it a mutualistic relationship.
Explanation:
Symbiotic relationship is a relationship between two organisms in which both organism benefit each other or both are equally depended on each other.In nitrogen fixation, both the plants and the bacteria benefit from the process of nitrogen fixation,making it a mutualistic relationship or symbiotic relationship between the plants and the bacteria.in nitrogen fixation plants provide carbon and shelter to the bacteria and in return bacteria provide nitrogen to the plants which helps plants to synthesize proteins and this association shows the symbiotic or mutual association or relationship.A ____ is a prediction of an outcome and the basis for experimentation.
a. hypothesis
b. conclusion
c. constant
Answer: A.
Explanation: A hypothesis is what you think may happen before you actually do the experiment to see what really happens. Usually one of the first steps of an experiment.
Scientists classify organisms into categories according to their shared characteristics. The most current system of classification sorts organisms into kingdoms first. Then, each kingdom is further sorted into different phyla, classes, orders, families, genera, and species. What is the name of this system of classification?
The taxonomic classification system, also known as the Linnaean system, was introduced by Carl Linnaeus and sorts organisms into hierarchical categories including domain, kingdom, phylum, class, order, family, genus, and species.
Explanation:The name of the system of classification that scientists use to classify organisms into categories according to their shared characteristics is called the Linnaean system. This system was developed by Carl Linnaeus in the 18th century and it is still widely used today. The Linnaean system organizes organisms into a hierarchical taxonomy, with the broadest category being domain, followed by kingdom, phylum, class, order, family, genus, and finally species.
The name of the current system of classification that scientists use is known as the taxonomic classification system or the Linnaean system. This system, invented by Carl Linnaeus, categorizes organisms using a hierarchical structure, beginning with broader groups that become more specific. The major categories in this hierarchical order include domain, kingdom, phylum, class, order, family, genus, and species. In binomial nomenclature, an organism's scientific name is made up of its genus and species name. This system reflects the relatedness of organisms, where those sharing a more recent common ancestor are grouped more closely together.
Use this link to explore the niche of a giraffe, then
answer the question provided.
Describe the niche of the giraffe.
DONE
V
Answer:
the niche of the giraffe is to graze.
Explanation:
i said this and got it right on ed
what is a societal problem that science can best help solve
Answer:
Social problem-solving is generally considered to apply to four different types of problems: Impersonal problems, for example, shortage of money; Personal problems, for example, emotional or health problems; Interpersonal problems, such as disagreements with other people.
Explanation:
Science can aid in addressing numerous societal issues such as climate change, health concerns, and technological advancements. Scientific research sheds light on factual information which guides our approach to these challenges. Through understanding the workings of our world, we can implement more effective solutions on a societal level.
Explanation:There are numerous societal problems that science can significantly aid in solving. One prominent example is the challenge of climate change. Science guides us in understanding the complexities of climate change and implementing solutions, such as decreased use of fossil fuels, enhancements in food production, and modifications in travel patterns to mitigate negative environmental impacts.
Scientific research is also critical in shaping our approach to healthcare, informing decisions related to disease prevention, mental health, and overall wellbeing. Without the evidence provided through scientific research, we risk relying on misinformation or unfounded beliefs.
Furthermore, science plays a pivotal role in navigating technological advancements. It allows us to comprehend the workings of technologies we use daily, like computers and phones, thus enhancing our ability to implement technology effectively and judiciously at a societal level.
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Which statement correctly explains what a scientific theory is?
Which of the following correctly provides an example of the hierarchical structure of living organisms?
A.
Organisms that live in the ocean, as opposed to on land, have developed different ways to obtain oxygen.
B.
Human blood cells are specialized to transfer oxygen throughout the body.
C.
The digestive system of animals is made up of organs that work together to break down food.
D.
Reptiles and amphibians have a shared ancestry, so many of their body structures are similar.
A lineage that goes through cladogenesis, or branching evolution, is considered to have a common ancestor if numerous common ancestors, rather than just one, can be found in the lineage. Thus, option D is correct.
What features that includes common ancestry?Compared to amphibians, reptiles are actually more closely linked to birds and mammals. The scales and claws of reptiles are the primary physical distinctions between them and amphibians.
Although they were not the first tetrapods, amphibians did separate from the stock that would later, in a paleontological sense, become the amniotes.
The progenitors of contemporary reptiles and amphibians. Tetrapods are descended from a family of lobe-finned fishes known as the Sarcopterygians.
Therefore, Reptiles and amphibians have a shared ancestry, so many of their body structures are similar.
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List the five components that an ecosystem
must contain to survive indefinitely.
Answer: In order to survive, ecosystems need five basic components: energy, mineral nutrients, water, oxygen, and living organisms.
Explanation: google
An ecosystem must contain abiotic factors, producers, consumers, decomposers, and energy flow to survive indefinitely.
Explanation:An ecosystem must contain the following five components to survive indefinitely:
Abiotic Factors: These are non-living components like sunlight, air, water, temperature, and soil that provide the necessary environment for living organisms in the ecosystem.Producers: These are plants and other autotrophic organisms that convert sunlight into food through the process of photosynthesis.Consumers: These are organisms that rely on other organisms for food. They can be further classified as primary, secondary, or tertiary consumers, depending on their position in the food chain.Decomposers: These organisms break down dead organic matter, releasing nutrients back into the ecosystem. Examples include bacteria and fungi.Energy Flow: The transfer of energy from one organism to another through the food chain. It is essential for sustaining life within the ecosystem.Learn more about Components of an ecosystem here:https://brainly.com/question/34270436
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Which Molecules I needed to cut and copy segment in DNA
Answer:
Biological catalyst has to be cut.
Explanation:
Enzymes are called "Biological catalyst".Enzymes are called Biological catalysts because they diminish the activation energy for reactions. As the activation energy is reduced the rate of reaction is increased.Many enzymes modify their state when substrates bind and it is known as "Induced fit".Enzymes are nothing but Protein(Biological molecules). Most of the biological reactions are catalyzed by Protein.Enzymes improve the rate of synthetic reactions without getting altered forever by the reaction.For this reason Biological catalyst are needed to be cut and copy segemnte in DNA.What issue do you think needs to be debated as we make decisions about stem
cell research?
Answer:
However, human embryonic stem cell (hESC) research is ethically and politically controversial because it involves the destruction of human embryos. In the United States, the question of when human life begins has been highly controversial and closely linked to debates over abortion
Explanation:
Hope this help
plz ,ark brainliest
Have a nice day!!!
Final answer:
The debate on stem cell research should focus on the ethical implications of using human embryos, regulation of cell differentiation, and the balance between human ethical beliefs and medical advancements. Public opinion is often divided, reflecting a complex array of religious and secular views which policy makers need to consider.
Explanation:
One significant issue that needs to be debated regarding stem cell research is the ethical implications of using human embryos in the research. Stem cells, which can be harvested from the umbilical cord at birth, are unique as they have the potential to develop into various types of cells in the body. This uniqueness presents vast medical opportunities but also prompts ethical concerns. These concerns include the moral status of embryos, the implications of modifying human genetic material, and the possibility of creating a market for human tissues. Decisions in the field of stem cell research are not straightforward as they involve complex considerations about the regulation of cell differentiation and the various types of regulation that may occur during this process. Additionally, policymakers must reckon with public opinion, which is often divided on the subject, as shown by differing viewpoints among religious and secular groups. Pertinent questions in the ethical debate of stem cell research might include: how do we balance human ethical or ideological beliefs with evolutionary cost-benefit calculations, which should be prioritized in medical decision-making? Furthermore, comparing the ethical issues of different types of gene therapy, such as somatic cell and germ-line gene therapy, can illuminate the unique nuances each presents. The voices of patients and their families, particularly in relation to serious medical conditions, are also a vital part of the conversation on stem cell research.
Which word refers to the smallest functional unit of a living thing?
cell
eyelash
organ
tissue
Answer: cell
Explanation: because an organ nor a eyelash is bigger
The picture says it all hope this helps someone
Explanation:
1. Why do you think seagrass beds might filter excess plant
nutrients and sediment well?
Answer: Without seagrass, most areas where they currently live would be a seascape of shifting sand and mud. Mangroves and seagrass also filter pollutants, absorb excess nutrients from runoff, and trap sediments, helping to increase the clarity and quality of waters.
Explanation: there you go have a good day.
The reason why seagrass beds might filter excess plants should be explained below.
Why might seagrass beds filter excess plant nutrients and sediment well?As without seagrass many areas where they presently live should be seascape for transforming the sand and mud. The mangroves and seagrass should also filter the pollutants, it absorbed the extra nutrients from running off also the sediments should be trapped so that the water quality should be increased.
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What statement is true about heterozygous organisms?
Heterozygous organisms are more diverse than homozygous organisms.
Heterozygous organisms can show either the dominant or the recessive trait.
Heterozygous organisms always show the recessive traits.
Heterozygous organisms have very low genetic diversity.
Answer:
the first one is correct
Explanation:
Final answer:
Heterozygous organisms can show either the dominant or the recessive trait, due to the Law of Dominance, which states that the dominant allele masks the effect of the recessive allele in heterozygous individuals.
Explanation:
The statement that is true about heterozygous organisms from the given statements is that they can show either the dominant or the recessive trait. This is due to the Law of Dominance, which states that in a heterozygote with one dominant and one recessive allele, the dominant trait is expressed in the phenotype. Thus, heterozygous organisms (Tt) will exhibit the same phenotype as homozygous dominant organisms (TT), while the recessive trait (tt) is only expressed in homozygous recessive individuals.
What did Redi find in his experiment?
A.Only the broth with the flask open to the air contained living organisms.
B.Flies were not found in the sealed jars of rotting meat.
C.Both broths contained living organisms.
D.Flies were found in all of the sealed and unsealed jars of rotting meat.
Answer:
The correct option is B) Flies were not found in the sealed jars of rotting meat.
Explanation:
Redi discarded the phenomenon or hypothesis for spontaneous generation through his experiments. The hypothesis of spontaneous generation supported that live could originate from non-living things.
Through his experiments, he proved that only flies could give rise to other flies. He did experiments by keeping meat pieces in a sealed and in an open jar. The absences of the flies in the sealed jar proved that meat could not give rise to flies and only flies gave rise to other flies.
Final answer:
The correct option is B. Flies were not found in the sealed jars of rotting meat. Redi's experiment demonstrated that maggots only developed in rotting meat when flies had access to it, not in sealed jars, hence disproving spontaneous generation.
Explanation:
Francesco Redi conducted an experiment that is considered one of the first to challenge the theory of spontaneous generation—the belief that living organisms could arise from nonliving matter. In his experiment, he used jars with rotting meat to demonstrate his hypothesis that maggots only arose when flies had contact with the meat. Redi's findings showed that flies were not found in the sealed jars of rotting meat, supporting the idea that maggots were the offspring of flies and not a product of spontaneous generation. As a result, option B is the correct answer.
A researcher incubates a cell with radiolabeled amino acids. These amino acids are incorporated into the proteins as they are synthesized by the cell. Select which piece of data would indicate the incorporation of radiolabeled amino acids during protein synthesis? A) Radioactivity levels would increase first at the nucleus, followed by the Golgi, and then the cell membrane. B) Radioactivity levels would increase first at the nucleus, followed by the ribosomes, and then the secretory vesicles. C) Radioactivity levels would increase first at the rough endoplasmic reticulum, followed by the Golgi, and then the secretory vesicles. D) Radioactivity levels would increase first at the rough endoplasmic reticulum, followed by the nucleus, and then the secretory vesicles.
Answer:
The incorporation of radiolabeled amino acids during protein synthesis occurs when the data shows the organelles involved with protein synthesis, packaging and transport, that is, radioactivity levels would increase first at the rough endoplasmic reticulum, followed by the Golgi, and then the secretory vesicles (option C).
Explanation:
Protein synthesis in the cell occurs when RNA -which contains the sequence of triplets or codons that make up the genetic code- is coupled to ribosomes.
Each codon or triplet, consisting of three nucleotides, will give instructions for specific amino acids to be incorporated into the polypeptide chain that is being synthesized in the rough endoplasmic reticulum.
The Golgi apparatus is responsible for packaging or packaging the newly synthesized proteins in secretory vesicles for transport.
In consecuense, radioactivity levels would increase in the organelles involved in protein synthesis, packaging and transport, the rough endoplasmic reticulum, Golgi apparatus and secretory vesicles, respectively.
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Answer:
c
Explanation:
took the usa test prep
Drag each label to the correct location.
Sort the examples into proper mechanisms of reproductive isolation,
Prezygotic Isolation
Postzygotic Isolation
Two species of guppies show different
mating behaviors.
A hybrid zygote of two species dies
after a few cell divisions in the
mother's womb.
Brown bears and polar bears are
separated by geographical area.
Twin closely related species
Two species of plants reproduce
Answer:
Prezygotic Isolation: Two Species of Guppies, Brown Bears and Polar Bears, Two closely Related Species of frogs.
Postzygotic Isolation: A hybrid zygote of two species, Two species of plants reproduce
Explanation:
Prezygotic isolation includes mechanisms that do not allow breeding of organisms. Postzygotic isolation includes mechanisms that cause isolation of species after fertilization.
This is the answer that I got when I submitted it on Edmentum and it said I was correct.
Prezygotic Isolation: Two Species of Guppies, Brown Bears and Polar Bears, Two Closely Related Species of frogs.
Postzygotic Isolation: A hybrid zygote of two species, Two species of plants reproduce.
What is Prezygotic isolation?Prezygotic isolation may be defined as a mechanism of reproductive isolation through which two individuals of the same species are isolated from one another prior to mating and fertilization.
Prezygotic isolation prevents the formation of a zygote. It provides the chances for natural selection.
Postzygotic isolation may be defined as a mechanism of reproductive isolation through which two individuals of the same species are isolated from one another after the event of mating and fertilization.
Therefore, it is well described above.
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