In some amniotes, which of the following is a waste product of nitrogen metabolism that is low enough in toxicity that it can be excreted as a semisolid paste, thus reducing water loss?

a. uric acid
b. nitric oxide
c. ammonium
d. squalene


Answer: a. uric acid

Biology & Microbiology

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When skeletal muscles contract such that bone segments to move closer together, this action is known as:

A. flexion B. extension C. lengthening contraction D. tetanus

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Mendel had experience in the fields of _______ and _______

A. Physics, mathematics B. English C. Psychology D. Biology E. None of these

Biology & Microbiology

In chromatin remodeling, acetyl groups are added to

A) mRNA. B) the DNA sense strand. C) the amino acid lysine. D) microRNAs.

Biology & Microbiology

Substances are often packaged into small ________ for transport, either through the membrane or throughout the interior of the cell

A) vacuoles B) corpuscles C) vesicles D) organelles

Biology & Microbiology