The corkscrew movement of spirochetes is due to

a. cryptic motility.
b. polar flagella.
c. cilia.
d. endoflagella.


Answer: D

Biology & Microbiology

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Fast and ____________________ muscle fibers contract rapidly but do not produce sustained contractions, whereas slow and ____________________ muscle fibers contract slowly but can produce energy for long periods of time via aerobic respiration

Fill in the blank(s) with correct word

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Increased carbon dioxide concentrations may contribute to

a. ozone depletion. b. global warming. c. eutrophication. d. groundwater contamination. e. biomagnification.

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Four of these statements about conifers are true. Which one is the exception?

A. They form seeds in female cones. B. They have needlelike and scale-like leaves. C. They have a thick cuticle. D. They have motile sperm. E. They are mostly evergreen.

Biology & Microbiology

The movement of sucrose and H+ into the cell by the same membrane protein reflects the actions of what type of transporter?

A. symporter B. mechanosensitive channel C. voltage-gated channel D. antiporter E. uniporter

Biology & Microbiology