D. The populations are in same areas but differ in population size.
Good luck! :)
Answer: Bones cells secrete an extracellular matrix that when combined with minerals becomes rock hard.
Explanation:
The correct answer is C.
In the aquarium, the water plants would provide the O2 molecules necessary for the snail's metabolism and the snail would release the CO2 molecules that are a byproduct of his metabolism into the container. The CO2 would later be used by plants to make sugar in the process of photosynthesis, releasing more O2 and the cycle of two gases would be completed.
Climate change is the choice that answers your statement
