It is believed that a bacterium, rather than coffee, alcohol, or spicy foods, cause ulcers. What is the genus of this bacterium?
a. E. coli
b. Salmonella
c. Botulina
d. Yersina
e. Helicobacter
E
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True or False: Intrasexual selection includes physical competition among males, whereas intersexual selection involves advertisement displays
A. true B. false
Populations of the peppered moth provide an
example of __________ selection. a. kin b. disruptive c. directional d. stabilizing e. artificial
Cartilage is different from bone because cartilage:a
is rich in nerves. b. contains veins. c. has a matrix that is composed almost exclusively of collagen. d. contains lymphatic vessels. e. contains arteries.
Which of the following statements is incorrect in the context of fossilization?
A. Impressions form detailed imprints of only external structures. B. Extreme pressure transforms the mineralized remains into rock. C. Sediments that slowly accumulate on top of the site exert increasing pressure. D. Minerals dissolved in the water gradually replace minerals in bones. E. Mineral particles settle out of the groundwater and crystallize inside cavities.