The largest reservoir of carbon is

a. living organisms.
b. oceans.
c. sedimentary rocks.
d. the soil.


C

Biology & Microbiology

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____ are the structures formed by roots that house nitrogen-fixing bacteria

Fill in the blank with the appropriate word.

Biology & Microbiology

A cell that is totipotent ____

a. has the potential to become any cell type of the adult b. induces nearby cells to follow a certain developmental pathway c. will never differentiate d. will not undergo determination e. has unregulated gene expression

Biology & Microbiology

The pulmonary artery carries blood away from the ____

a. aorta b. right atrium c. right ventricle d. left atrium e. left ventricle

Biology & Microbiology

Enzymes in the digestive tract catalyze hydrolysis reactions.

a. true b. false

Biology & Microbiology