Ultimately, the health of life on Earth depends on our ability to live within our limits. The goal is to live ____

a. extravagantly
b. carelessly
c. frugally
d. fearfully
e. sustainably


ANSWER: e

Biology & Microbiology

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The two strands of a DNA double helix are held to each other by ____ bonds between nitrogenous

bases.

a. phosphodiester b. disulfide c. glycosidic d. hydrogen e. peptide

Biology & Microbiology

Most animal lineages evolved during the ___

period.

a. Cretaceous b. Devonian c. Ordovician d. Silurian e. Cambrian

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Enzymes

a. are not specific. b. act as catalysts. c. are inorganic molecules. d. have special shapes that react to their activities. e. are cholesterol derivatives.

Biology & Microbiology

One morning you discover that a tire on your auto is in need of air. As you add air to the tire, what happens.

What will be an ideal response?

Biology & Microbiology