All arteries, with the exception of the ____, contain oxygen-rich blood
a. aorta
b. carotid arteries
c. coronary arteries
d. pulmonary arteries
e. mesenteric arteries
d
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Which is most abundant and active in divisome complexes?
A) FtsZ B) DNA replication forks C) MinCD D) MreB
Several new tetraploid species of a plant called salsify (Tragopogon) known as salsify have arisen in western North America. These new species each arose from a diploid species that went through the process of allopolyploidy. This mode of speciation is a type of ________ and it occurs _______.
A. allopatric speciation; almost instantaneously B. allopatric speciation; very slowly C. sympatric speciation; almost instantaneously D. sympatric speciation; very slowly E. adaptive radiation; very slowly
Earthworms show all of the following features except
A. containing segments with a mouth on the first and the anus on the last. B. containing touch-sensitive and light-sensitive organs in the segments. C. containing fewer setae than in polychaetes. D. containing distinct head regions and parapodia. E. being hermaphroditic.
Resistance to tripping and falling seems to be most directly correlated to a person's
a. age. b. speed of reaction. c. strength of hip and trunk muscles. d. number of slow-twitch muscle fibers. e. amount of exercise.