Answer:
Its A- A mutation causes cells to divide without stopping.
Explanation:
Answer:
The embryo develops the heart, nervous system and face.
Explanation:
The nervous system is one of the first things to develop, following is the heart and then their face. Physical traits which also develop are the arms, legs and sexual organs.
The process of __clonal selection__
Answer: facilitate the transport of substances across a cell membrane.
Explanation:
