Bottleneck is the term used to define chance changes in the frequency of alleles which have a significant effect on small populations. The effect is that the population is greatly reduced because of the change in the allele frequency. A genetic drift will follow which will expedite evolution.
<span>The pattern of evolution this relationship presents is, convergent evolution. </span>
Answer:
If you're looking for a term, I believe the answer is heterotrophic.
Explanation:
Heterotrophs consume other organisms (be it plants or animals) to get their energy.
Autotrophs are organisms that make their own food (plants use sunlight in a process called photosynthesis to make glucose, which they use for energy).