Answer:
A) climate change...........
Answer: net primary productivity is the amount of energy lost through respiration by producers SUBTRACTED From the gross primary productivity of an ecosystem
Answer:
Astrocytes
Explanation:
Astrocytes are the most numerous cell type within the central nervous system (CNS) and they perform a myriad of tasks ranging from axon guidance and synaptic support, to the control of the blood brain barrier and blood flow.
The answer is a hypothesis Natural phenomena are those that occur or manifest without human input.