a. Primordial reducing atmosphereb. Origin of photosynthesisc. Increase in atmospheric oxygen and the development of the ozone layer.d. Origin of eukaryotes
a. Predator - prey relationshipb. Commensalismc. Mutualismd. Parasitism
a. Geographical barriersb. Ecological (including seasonal) isolationc. Behavioral isolationd. Polyploidy
a. The antigen-antibody response to a skin graft from another person.b. The reactions of the body leading to inflammation of a wound infected by bacteria.
a. Convergent evolution of organisms and Australiab. Blood groups and genetic driftc. Birds of prey and DDT
a. Territorialityb. Dominance hierarchiesc. Courtship behavior
a. Describe the steps in the synthesis of this polypeptide.b. What would be the effect of a deletion or an addition in one of the DNA nucleotides?c. What would be the effect of the nucleotides?
a. The gametophyte generationb. Sperm transport and fertilizationc. Embryo protection