This cell organelle helps organisms maintain homeostasis by controlling what substances may enter or leave cells. That's my question

During a fierce storm a large number of tall trees on an island are uprooted by the wind and die. most of the trees on the island are now short trees and produce seeds that grow into short trees. what concept is shown in this example? question 5 options: natural selection artificial selection genetic engineering gene splicing

Mercury had an average distance to the sun of 0.39 au explane how to calculate the orbital period of mercury and then calculated it

Explain how natural selection the survival of a species.