Answer:
no it can lead to defects as well as leading to evolution, such mutations can happen from more than one factor as well such as environmental factors personal factors ect
<span>Plants absorb energy from the sun and use photosynthesis to make sugars. Animals have mitochondria that use the sugars provided by plants to produce their own cellular energy. If there is not plant animal will have difficulty in getting energy. Also there are competition on the part of animals and human. I hope it helps. </span>
I believe it's stem cells.