Answer:
it is c: Taking observations at precise intervals
Explanation: I just took the test.
A. The hosts body could reject the transplanted stem cells
Layering.
Hope this helps (:
-Payshence xoxo
The correct answer is D Fish ( someone asked me to explain why d is the answer) A sponge obviously doesn’t have a brain, a hydra is an organism and organisms don’t have brains ( hydra also doesn’t have eyes)
A question is something someone asks. A hypothesis is like a person's theory.