Answer:
Genetic drift
Explanation:
Genetic drift is an evolutionary mechanism that in a population it changes allelic frequencies over generations just by chance. For this reason, small populations are more susceptible to be affected by genetic drift than bigger populations.
In this example, Indiana Jones visited a small village of 50 people and over generations allele A probably was lost just by chance, or by genetic drift.
They both share the derived characteristic of a long tail, a large head, and having a back bone (or being a vertebrate).
Answer:
A climax community
Explanation:
A climax community is a relatively stable community in which the component species are in equilibrium with one another.
Ecological succession involves a gradual change of the species composition structure of a community over a period of time.
<em>Depending on the initial state of a community, the species composition keeps changing from pioneer species of a completely new habitat in primary succession through secondary succession and, in the absence of disturbance, to a stable community which is referred to as a climax community.</em>
