Which of the following does NOT describe the heart? a)The heart has two pumps
b)All of the muscle tissues of the heart do not contract at the same time
c)The heart has two chambers with specific tasks to do
d)Different parts of the heart contract at different times

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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.

During the process of two rails or sides break apart and attract new nucleotide bases to form a new and complete strand.

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction.