Question

Which of these statements is true about adaptive evolution? A. The ability to learn plays a key role in the process of adaptive evolution. B. Viruses play a key role in the process of adaptive evolution. C. Sudden changes in the somatic cells of organisms play a key role in the process of adaptive evolution.

Answer 1

Viruses play a key role in adaptive evolution by introducing genetic variation into host populations.

Step-by-step explanation:

The correct statement about adaptive evolution is statement B: Viruses play a key role in the process of adaptive evolution.

Viruses have the ability to introduce genetic variation into the hosts through viral replication and infection. This genetic variation can lead to adaptation and evolution in the host population.

For example, when a virus infects a population, some individuals may possess genes that provide resistance to the virus. These individuals are more likely to survive and reproduce, passing on the resistant genes to future generations. Over time, the resistant phenotype becomes more dominant in the population, illustrating the process of adaptive evolution.

Answer 2

The correct answer will be option-C.

Step-by-step explanation:

Adaptive evolution is the evolution which resulted from the progression of the advantageous phenotype in the population. The adaptations in a population occur as a result of the natural selection which causes the change in the alleles to produce adaptable features in an organism.

The changes due to mutation take place in the somatic cells which are passed on to the offspring to become fit in the environment and increase their chances of reproduction and survival.

Thus, Option-C is the correct answer.