Answer:
d) polyps; calcium carbonate
Explanation:
The Acanthaster planci It is a kind of invasive starfish, which destroys corals: it has poisonous spines and feeds on coral polyps at the expense of the reef.
On the other hand, CO2 reacts with water, forming carbonic acid and reducing the available calcium carbonate, an essential element so that marine organisms, from clams to hedgehogs, can form their skeletons and shells.
Dependent: heart rate independent: type of activity
Answer:
the answer is A. Don't expect a explanation because this question is too easy for me to explain . Have a nice day!
Answer:
It allows flexibility (adjustment) and survival of a population in the face of changing environmental circumstances.
Explanation:
