The best answer would be "research reasons why species change over long periods of time"
if not i apologize but this is my best guess<span />
T-cells are a type of white blood cell that circulate around our bodies, scanning for cellular abnormalities and infections.
B, hormones that serve as chemical messengers im not 100% sure though
Answer:
The Core?
Explanation:
You would think that heat would come from the core but I'm not sure
Answer:
i think it's "C"
Explanation:
because if both have similar structure then just have some relation
