During the citric acid cycle, ____.
A. four CO2 molecules are produced
B. oxaloacetate is consumed
C. electrons and H+ are removed from the coenzymes NADH and FADH
D. molecules of carbon dioxide are consumed
E. oxidative phosphorylation occurs
Answer: A
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The primary, natural habitat of a pathogen where it continues to exist is called the ________.
A. fomite B. source C. reservoir D. vector E. carrier
Pollen requires all of the following to germinate
EXCEPT a. contact with epidermal cells of the stigma b. binding to the stigma by species specific adhesion proteins c. nutrients to diffuse into the dry pollen d. metabolism to begin in the two cells in the pollen grain e. all of these are required
What is the shell actually made up of?
What will be an ideal response?
Mutations are important because they do what?
(A) provide variation that can result in evolutionary change. (B) occur in response to environmental demands. (C) are always beneficial in the individuals affected by them. (D) usually provide an individual with increased reproductive rates.