Scientists ask questions and develop hypotheses. after making what?

a. observations

b. conclusions

c. contact with other scientists

The bacteria found in a soil is usually harmful and measure are taken to remove any traces of microorganisms 1. true 2. false

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.

Compare the composition of the moon's surface with the composition of the earth's surface.