Phosphorus is an essential nutrient for plants and animals. Phosphorus normally occurs in nature as part of a phosphate ion (PO4)3. Unlike many other biogeochemical cycles, the _____________ does/do not play a significant role in the movement of phosphorus.

Fill in the blank(s) with the appropriate word(s).


Answer: Atmosphere

Biology & Microbiology

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_____ is life’s primary source of energy.

a. Food b. Water c. Sunlight d. ATP

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The mechanism of muscle contraction was first studied in ____ muscle using high-resolution ____ microscopy

a. skeletal; light b. smooth; light c. skeletal; electron d. smooth; electron e. cardiac; electron

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For which of the following diseases would animal models likely yield the most information?

A. Alcoholism D. Huntington disease B. Schizophrenia E. PKU C. Bipolar disorder

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Normal microbiota are typically found in and on all the following body locations EXCEPT the

A) skin. B) mouth. C) colon. D) blood. E) upper respiratory system.

Biology & Microbiology