Whether an area of the country will be a desert or grassland is primarily determined by 

A. the average temperature.
B. the average rainfall.
C. the length of the winter.
D. the kinds of animals in the area.


B. the average rainfall.

Biology & Microbiology

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The solar system formed ____ billion years ago

a. 4 b. 5 c. 6 d. 7 e. 8

Biology & Microbiology

Radiation exposure can destroy lymphocytes and lead to what?

a. meningitis b. cancer c.an immunodeficiency d. a hypersensitivity

Biology & Microbiology

Halophiles are able to survive

a. under any extreme environmental condition. b. in extremely high salt concentrations. c. at very high temperatures. d. by producing methane. e. at very cold temperatures.

Biology & Microbiology

Both theory and evidence strongly suggest that social behaviors are determined by genes.

Answer the following statement true (T) or false (F)

Biology & Microbiology