As an energy source, To heal and build and repair tissue, To sustain growth, To help transport oxygen to the cells, To regulate body functions. hope this helped :)
The Genotypes would have to be dominant too, but that means multiple options unless you can clarify more but the options would be: Cc, Cc or CC,CC or CC Cc.
Answer:
Explanation: The heart pumps blood through the network of arteries and veins called the cardiovascular system.
I would go D because they survive by getting the adaptations their parents gave to them