<span>The state in which all body systems are functioning smoothly and in equilibrium is homeostasis.</span>
Answer:
A. Many dinosaurs were present in upper layers of rock strata, but not in lower layers.
Explanation:
In my opinion, this is the best possible answer.
A. Certain factors are dominant, and others are recessive
The answer is theory development.
That's it because if you were a scientist, you couldn't collect data if you were forming a theory. I mean, how would you create a theory if you haven't even collected any data?!?!
That's my answer for ya!
B is the answer.
Hope this helps!