The two main types of fermentation are called…
a)alcoholic and aerobic
b)pyruvic acid and anaerobic
c)alcoholic and lactic acid
d)lactic acid and aerobic

Which statement names a chemical property of iron? a: it is dense b: it becomes rusted c: it’s hard to bend d: it has a melting point

Which of the following is a possible reason for sleep? a) growth b)digestive c)speed d)intelligence

The earth consists of a variety of different organisms. despite their diversity, however, some similarities on the structural and metabolic levels may be seen. these similarities can be attributed to a. similarities among organisms in their proteins and nucleic acids. b. the ability of organisms to readily adapt to sudden environmental changes. c. similarities in organisms' habitats and niches. d. the ability of all organisms to interbreed and produce new species.