Cilia are:
A) the cytoplasmic extensions or false feet that some cell types use for locomotion.
B) many short, hair-like cellular extensions that beat to produce movement.
C) the circular chromosomes of bacteria.
D) different kinds of cells, each designed to perform a different function.
Answer: B
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An infection of the membranes covering the brain is called
A. encephalitis. B. meningitis. C. arachnitis. D. ventriculitis.
Ribozymes
a. are RNA catalysts. b. are proteins that catalyze RNA synthesis. c. are RNA molecules that slow the rate of protein synthesis. d. are the products of RNA degradation. e. are amino acids that catalyze RNA synthesis
Most skates are:
a. ovoviviparous. b. oviparous. c. live bearers. d. viviparous. e. broadcast spawners.
Insects have an excretory system consisting of Malpighian tubules. Indicate whether the statement is true or false