There are four evolutionary forces.Which of the following is not one of these?
A chance creation of a new allele is called:
Which of the following statements about mutation is correct?
A)The rate at which mutations occur in populations is constant.
B)Mutation does not contribute to the variability of a gene pool.
C)All mutations are harmful.
D)All mutations are caused by environmental factors external to the body,such as chemicals in food or X rays.
E)The only mutations of evolutionary significance are those which occur in sex cells.
Adaptation is best described as all of the following except:
A)a series of beneficial adjustments to the environment.
B)not an active process but rather the outcome of natural selection.
C)the way humans make beneficial adjustments to their environment through culture as well as biology.
D)a result of gene flow and genetic drift.
E)occurring through natural selection at the genetic level.