In a population of beatles there are green and brown colorations that occur with equal frequency. after a forest fire, only 20 beatles remain. 18 of them are green and two of them are brown. what describes this change in frequency’s

C) A population bottleneck occurred, altering the resulting allele frequencies.

Explanation:

Population bottleneck can be described as the reduction which occurs in a population due to any environmental factor like fire or due to the activities of humans like hunting etc.

A large number of Beatles got killed due to the fire. The reduced population that is left has an altered gene frequency. This phenomenon can be described as a genetic drift that has occurred and caused changes in the genetic frequencies.

answer;

c. a tree whose roots are surrounded by wet sand.

explanation;

water stress is an important factor limiting the growth and productivity of forests.water stress is the most often cited cause of poor survival and growth of woody landscape plants.

-insufficient soil moisture is the most common form of water stress, but excess moisture that leads to poor soil aeration (hypoxia) can also result in reduced plant vitality. a tree whose roots are surrounded by wet sand would be least likely to experience water stress.