The splitting of water and the generation of oxygen occur where?
A. Photosystem I
B. The Krebs Cycle
C. The Calvin Cycle
D. Photosystem II
D. Photosystem II
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The tendency of toxins to accumulate in top predators is called biological ________.
A. mitigation B. magnification C. concentration D. remediation
Homo erectus _____
a. was the earliest member of the genus Homo b. was one of the australopiths c. evolved in Africa and dispersed to many regions d. disappeared as the result of an asteroid impact
In the accompanying figure, the responses initiated at point A in response to an increase in body temperature include:
a. a decrease in sweating and panting
b. a decrease in muscle activity
c. a constriction of blood vessels
d. an increase in metabolism
e. shivering
How is the reaction 2H2 + O2? 2H2O described in words?
A) Two molecules of hydrogen combine with two atoms of oxygen to form two molecules of water. B) Two molecules of hydrogen combine with two molecules of oxygen to form two molecules of water. C) Two molecules of hydrogen combine with one molecule of oxygen to form two molecules of water. D) Two atoms of hydrogen combine with one atom of oxygen to form two atoms of water. E) Two atoms of hydrogen combine with two atoms of oxygen to form two molecules of water.