A substance that resists or minimizes changes in pH when an acid or base is added to a solution is ________.

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


Answer: a buffer

Biology & Microbiology

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Melvin Calvin and his colleagues used which of the following to deduce the steps in the Calvin-Benson cycle?

A) negative staining B) Drosophila melanogaster C) electron microscopy D) ultracentrifugation E) radioisotopes

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Species interactions between members of a community include __________, which benefits both

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

Biology & Microbiology

Liquid water ________.

A) is less dense than ice B) has a specific heat lower than that of most other substances C) has a heat of vaporization higher than that of most other substances D) is nonpolar

Biology & Microbiology

Short chains of sugars attached to proteins or phospholipids in the cell membrane make up the:

A) cholesterol. B) phospholipid bilayer. C) communication proteins. D) glycocalyx.

Biology & Microbiology