African sleeping sickness is caused by Trypanosoma brucei, a unicellular, flagellated protist that infects red blood cells after entering the bloodstream. Trypanosoma brucei is which of the following?
A. an alga
B. a protozoan
C. a slime mold
D. a diatom
E. a water mold
Answer: B. a protozoan
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Fermentation is a process that proceeds without oxygen. Such a process can be described as ________.
Fill in the blank(s) with the appropriate word(s).
DNA replication is
a. redundant. b. semiconservative. c. progressive. d. conservative. e. repetitive.
Which of the following is an example of predation?
A) a lizard's camouflage B) a hawk swooping down quickly to capture, kill, and eat a prairie king snake C) a goldfinch feeding on the seeds of a thistle plant D) the vivid colors of the poison-arrow frog in Costa Rica E) mechanical devices, such as quills in a porcupine
Microtubules are not involved in
a. movement of chromosomes during mitosis. b. transport of membranous vesicles in the cytoplasm. c. cytokinesis of animal cells. d. movement of cilia and flagella. e. positioning of Golgi in cells.