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16 February, 13:15

Select all of the examples that represent biological evolution.

1. Horses that get more exercise become stronger and will have foals that are stronger.

2. The number of individuals with the type O blood genotype increases in a small human population due to a reduction in population size.

3. One species from the mainland diverges into two distinct species on a group of islands.

4. Individuals in a population exposed to high levels of ultraviolet light become blind as adults and will have offspring that are also blind.

5. The frequency of the gene for sickle-cell anemia in a human population decreases from 0.002% to 0.001%.

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  1. 16 February, 15:00
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    The correct answer is - option 2, 3, and option 5.

    Explanation:

    Biological evolution is the change in genetic level of an individual population that is developed or inherit over a period of time and several generations. Changes can be minute, large, can be identified or not noticeable.

    In the given question some of the examples of biological evolution are given such as O genotype individuals increases due to the reduction in population size in the small human population, similarly, one species diverged into two different species on the basis of the adaption they developed in island. Sickle cell anemia frequency is also is an important example of the as it decreases over time.

    Thus, the correct answer is - option 2, 3, and option 5.
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