Why do photosynthetic organisms that live less than 25 feet below the surface of the ocean do not need phycoerythrin to survive? Provide reasoning that explains this claim.

Zoo geographic regions are characterized by the presence of specific groups of animals these regions are determined by the taxonomic or phylogenetic relationships of animals. the map shows the zoogeographic regions proposed by the naturalist alfred russel wallace in 1876. the similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between the organisms in both locations ?