Epiphytes are _____

A) aerial vines common in tropical regions
B) plants that live in poor soil and digest insects to obtain nitrogen
C) plants that grow on other plants but do not obtain nutrients from their hosts
D) plants that have a symbiotic relationship with fungi


C

Biology & Microbiology

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To increase the sensitivity of direct Gram-stain examination of body fluid specimens, the specimens are usually:

a. incubated for 18 to 24 hours before stain-ing. b. centrifuged before staining. c. examined for at least 1 hour. d. stained for an additional 5 minutes.

Biology & Microbiology

When DNA folds and winds into the nucleus of a cell, it shrinks in length by a factor of

A) 10. B) 100. C) 1,000. D) 7,000.

Biology & Microbiology

Select the description of a population pyramid for a population that has the largest potential for exponential growth. 

A. broad at the base, narrow at the top, with more females than males B. broad at the base, narrow at the top, with more males than females C. uniform at all age classes, with more females than males D. broad at the top, narrow at the base, with more males than females E. broad at the top, narrow at the base, with more females than males

Biology & Microbiology

Molecules that do not dissolve in water very easily are characteristically 

A. acids. B. fats. C. vitamins. D. carbohydrates.

Biology & Microbiology