Answer:
There are three sources of genetic variation: mutation, gene flow, and sexual reproduction. A mutation is simply a change in the DNA. Mutations themselves are not very common and are usually harmful to a population. Because of this, mutations are usually selected against through evolutionary processes.
Explanation:
What is this for and what’s your question
The answer is A. Its relative cheapness compared to its renewable counterparts is what allows nonrenewable resources to continue to dominate the market. Also, you can conclude this answer through elimination of the other three choices. Nonrenewable resources actually have a higher impact on the environment because of its contribution to greenhouse gas emissions. Also, it being used up rapidly and contributing to global warming are both true, but are disadvantages rather than advantages.
