Severe or sudden changes in Earth's atmosphere can cause entire species of animals to die. When all of the members of species die out, it is called mutation.

natural selection.

extinction.

revision.

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is

1. variations in a population of moths allow for some of its members to be able to adapt to environmental changes. the better adapted of the moths will be able to survive the change and thus prevail as the “fittest” of the species. (a) describe three mechanisms in which variation can occur within a species population. (b) explain which mechanism or mechanisms would be responsible for the survival of a population of peppered moths better than white moths in an environment affected by industrial soot. justify your answer.

The intervention of extraterrestrials has been used to explain the bermuda triangle, a region of the atlantic ocean where ships and planes are frequently lost, leaving no evidence behind. how would this explanation best be characterized?