Scientific research about the nitrogen cycle and water quality is mostvaluable to human populations with: afew sources of electricity. b. few sources of fresh water. c. large coastal populations. d. large amounts of farmland.

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom

According to this food web which of the following would be considered primary consumers

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 ?