Mutations
your

a. randomly occur in organsims
b. occur only if the environment allows
c. happen because of artificial selection
d. are always harmful to the organism

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

_tissues respond quickly to outside stimuli a) epithelia b)nervous c)muscular d)muscular and nervous

An uncomfortable feeling in the ears when descending in an airplane is caused by changes in air pressure on the: a. inner ear b. middle ear c. eardrum d. hammer/anvil