ATP is formed when __________ the thylakoid lumen
a. hydrogen ions enter
b. hydrogen ions leave
c. electrons enter
d. electrons leave
e. water is split in
B
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____ asteroids appear to have nickel-iron compositions and may be the cores of broken asteroids
a. S-type b. M-type c. C-type
What plant group has the largest number of living species?
A. Seedless, nonvascular plants B. Cone-bearing plants C. Flowering plants D. Seedless vascular plants
At what stage of the cell cycle is DNA found in its condensed form, which is known as a chromosome?
a. throughout prophase only b. throughout prophase and metaphase c. throughout the cell cycle d. throughout mitosis until late telophase