The answer is C- Excretory system. Hope this helps :)
I don't know exactly what you mean but the size of a group affects its defense because there is a larger group. Therefore, more people would be protecting it, adding more to its defense.
The answer is to this question is A
Photosynthesis reverses the biochemical pathways of respiration.
False its called cell division not splitting it is splitting but the correct term is cell division
