The oxygen given off by photosynthesis comes from
a. H2O.
b. glucose.
c. CO2.
d. RuBP.
a. H2O.
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The structure that covers the opening to the trachea during swallowing, thereby preventing food from entering the air passageway, is the
A. epiglottis. B. cecum. C. rumen. D. uvula. E. soft palate.
A population includes
a. all organisms of the same species in one place at a given moment. b. the organisms and their physical environment. c. the physical environment in which an organism exists. d. all organisms within the environment at a given moment.
Response to a stimulus, such that the effect of the stimulus is counteracted, is called ________ feedback
A) positive B) simple C) holistic D) negative
The PCR technique requires a DNA polymerase from an organism that can endure high heat, such as Thermus aquaticus. What step of the protocol makes the heat-stability most necessary?
A. Synthesis B. Denaturation C. Primer annealing D. Antibody binding