They follow where the cold is going
Dna profiling and replication, stem cell and tissue engineering, <span>xenotransplantation</span>
Answer:
The answer is the second option: a Biotic Community
<span>There might have been a change in the climate of a region, and the plants or animals could have died out because of the change in the weather. Or one animals might have been destroyed by another that was stronger or more adapted.</span>
During the last and final stage where there is a possibility of 30-36 ATP production rate