Which event will lead to primary succession?
a. None of these choices
b. Fire burning through 100 square miles of coniferous forest.
c. A volcanic eruption on a Hawaiian island.
d. A farm field being abandoned.
e. A river flooding its banks every spring.
c
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The major virulence factors of Yersinia pestis are carried on
A. the chromosome. B. a plasmid. C. three separate plasmids. D. nuclear membrane.
The correct sequence for a sound (a vibration) traveling into the mammalian ear would be listed as
A. pinna, tympanum, ossicles of middle ear, oval window, basilar membrane, hair cell B. tympanum, pinna, ossicles of middle ear, hair cell, oval window, basilar membrane C. pinna, ossicles of middle ear, tympanum, basilar membrane, oval window, hair cell D. hair cell, pinna, basilar membrane, ossicles of middle ear, tympanum, oval window E. pinna, oval window, tympanum, basilar membrane, ossicles of middle ear, hair cell
Hominids are characterized by
a. further expansion and elaboration of the brain. b. bipedalism. c. omnivorous feeding behavior. d. further expansion and elaboration of the brain and bipedalism. e. further expansion and elaboration of the brain, bipedalism, and omnivorous feeding behavior.
Which of the following diseases can be prevented by vaccination?
A. typhoid fever B. salmonellosis C. cat scratch disease D. gonorrhea E. chancroid