<span>A. If one essential nutrient within an ecosystem runs out, primary productivity will be limited.
A specific nutrient is need for every organism in the ecosystem. If this particular nutrient is diminished within the ecosystem then cellular processes will decreases and a great number of specie will die. </span>
Answer:
True
Explanation: hope this helps!
Answer:
Hypotonic
Explanation:
there is less concentration in the blood compared to the brain