Option B, "They need more oxygen to function, so gas exchange needs to increase. "
The double helix unwinds and each strand forms a template for a new strand — I’m pretty sure!
Answer:
A cell that results from the fusion of sperm and ovum is called a zygote. The process of fusion of sperm and ovum is called fertilization.
<h2>Receptors for hearing are in the cochlea; receptors for balance are in the vestibule.</h2>
Hope this will help....