Often organisms seem similar in their outward appearances. for example, a porpoise and a shark seem closely related, but they are not. such similarity is the result of a. genetic equilibrium. b. convergent evolution. c. adaptive radiation. d. artificial selection.

Fan egg cell containing the (n+1) number of chromosomes combines with a sperm cell containing the (n) number of chromosomes, what is the result of this union? a) all future somatic cells of the organism will contain the (2n + 1) number of chromosomes. b) all future somatic cells of the organism will contain the (2n - 1) number of chromosomes. c) only certain somatic cells of the organism will contain the (2n + 1) number of chromosomes. d) all future somatic cells of the organism will contain the normal diploid number of chromosomes.

During convection, less dense fluid rises and denser fluid sinks.

Why has two different alleles for the same trait?