Which statements describe the importance of the nitrogen cycle to living things? Select two options. A It provides a source of water.
B It helps cells make proteins.
C It provides a form of usable nitrogen.
D It removes carbon dioxide from the atmosphere.
E It destroys harmful bacteria.
F It helps cells make glucose.

Which of the following will not cause mass extinction? a. drastic change is weather b. geological change c. both a and b d. none of the above

Study this image which statement best describes the rock shown check all that apply

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 ?