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Given a population that contains genetic variation,what is the correct sequence of the following events,under the influence of natural selection?
1) Well-adapted individuals leave more offspring than do poorly adapted individuals.
2) A change occurs in the environment.
3) Genetic frequencies within the population change.
4) Poorly adapted individuals have decreased survivorship.
Chemotherapy
A form of cancer treatment using drugs to kill or inhibit the growth of cancer cells.
Infection
The invasion and multiplication of microorganisms such as bacteria, viruses, and fungi in body tissues, which can cause illness and disease.
HIV
Human Immunodeficiency Virus, a virus that attacks the immune system and can lead to AIDS if not treated.
Viral Infection
An illness or disease caused by viruses, microorganisms that can replicate only inside the living cells of an organism.
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