Which of the following is true of biogeochemical cycles? Choose 1 answers
They ensure that nutrients are only used once by organisms.
They increase the total amount of matter over time.
They can be affected by human activity,
They create new atoms to replace lost ones.

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