The sinoatrial node is located in the ____

a. left atrium
b. left ventricle
c. pulmonary artery
d. right atrium
e. right ventricle


ANSWER: d

Biology & Microbiology

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The big bang theory states that the universe began approximately ________ years ago

a. 3.5 billion b. 10,000 c. 1.2 million d. 120 million e. 13 billion

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Herons and egrets are members of the:

a. gulls. b. tubenoses. c. shorebirds. d. pelicans. e. duck family.

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When the photosynthetic organisms evolved the ability to split water, they produced _____ as a waste material, which was poisonous to most of the cells then alive

a. hydrogen gas b. hydrogen sulfide c. water d. carbon dioxide e. oxygen

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Texting while driving involves which types of driving distractions?

A) real and imagined B) spatial, temporal, and peripheral C) visual, cognitive, and manual D) steering and speed E) oral, auditory, and perceptual

Biology & Microbiology