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

Biology & Microbiology

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Which is most abundant and active in divisome complexes?

A) FtsZ B) DNA replication forks C) MinCD D) MreB

Biology & Microbiology

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

Biology & Microbiology

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.

Biology & Microbiology

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.

Biology & Microbiology