The outer boundary of a root’s vascular cylinder is a layer of cells called ____
a. pericycle
b. cortex
c. epidermis
d. stele
e. endodermis
ANSWER: e
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Blood pressure in the body is internally monitored by a homeostatic mechanism known as _______
Fill in the blank(s) with the appropriate word(s).
An example from the text contrasts two forests, each with 10 species and a total of 50 trees. In the first forest, 39 of
the 50 trees represent the dominant species. The second forest has 5 of each of the 10 different species. What conclusion can be drawn regarding these two forests?
a. The amount of animal species in each forest would be the same. b. The first forest is more diverse than the second. c. The first forest must have had some human interference. d. The second forest is more diverse than the first. e. The second forest must have had some human interference.
What happens if a growing shoot's tip breaks off?
a. Auxin levels rise. b. Cytokinin levels drop. c. Cytokinin levels rise and stimulate lateral bud growth. d. Auxin levels remain constant but efflux carrier distribution changes. e. Cytokinin stimulates a new apical meristem.
A lab report on a respiratory patient's sample contains the notation MDR-TB. What does this mean?
A) The two standard drugs for TB, isoniazid and rifampin, are not effective. B) The patient has a mild case of TB. C) There are almost no drugs that will treat the infection. D) Most standard drugs for treatment of TB are recommended. E) The bacteria responsible for the infection are moderately resistant to isoniazid and rifampin.