Marathon runners tend to have a high percentage of ____ in their leg muscles
a. slow, red fibers
b. slow, white fibers
c. fast, red fibers
d. fast, white fibers
e. both red and white fibers
ANSWER: a
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As a general rule, the small intestine of a pig or human is
(a) about 60 cm long. (b) about 1.5 m long. (c) about as long as the individual is tall (or long in the case of the pig). (d) about five times the height of the individual.
Many terrestrial ectotherms regulate their temperature by ____
a. moving into or out of the shade b. eating more c. hibernating d. growing more hair e. increasing metabolic rate
Associations of fungi and plant roots are called
A. root forks. B. mycorrhizae. C. lichens. D. gnetophytes. E. rhizoids.
Cell walls of plants contain cellulose and __________, which aids in structural support
a. cutin b. chitin c. lignin d. lipopolysaccharide e. actin