Dense regular connective tissue consists of tightly packed _____
Fill in the blank(s) with the appropriate word(s).
collagen fibers
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Polypeptides (proteins) are composed of amino acids as ________ are composed of DNA.
A. genes B. RNA C. proteomes D. lipids E. metabolites
The fundamental unit of heredity is called a(n) ____________________
Fill in the blank(s) with correct word
If N2 gas comprises 79 percent of atmospheric air at sea level, what is PN2?
a. about 300 mm Hg b. about 400 mm Hg c. about 500 mm Hg d. about 600 mm Hg e. about 700 mm Hg
Why does producing a large "clone" of activated T cells also provide long-term immunity?
A) Some of the T cells become memory cells. B) The cloned cells are stronger than the original cells. C) Some of the T cells can become B cells. D) Leftover antibodies last a long time. E) More cells are produced than necessary.