The virus injects genetic material (DNA or RNA) into the host cell. Have a lucky day :)
The benefits of artificial selection is that you've taken the traits that you desire from a plant or an animal that could benefit your own survival. (Much like our ancestors bred the highest/most efficient crops, leaving us in a good farming position today). However, the drawbacks of artificial selection is that you effectively destroy any natural selection or "survival of the fittest" thus reducing the gene pool. If a virus or bacteria was effective against a crop that we bred, it would destroy our entire farming industry (also works with animals that we breed).
The correct answer in this question is letter B. Through adaptation, an organism increases its chance of survival. This intensifies the fitness of species. A population may lead to extinction if its species did not adapt to the environmental changes.
6-9 feet long is the average.
