Plants require a lot of water for hydration, metabolism, homeostasis, and photosynthesis. How is water used in photosynthesis?
A. as an electron donor in the photosystems
B. to combine with NADP+ to form NADPH
C. to combine with ADP to form ATP
D. as an electron acceptor in the electron transport chain
E. as a substrate for ATP synthase
A. as an electron donor in the photosystems
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Primary production is generally highest in
A. tundra. B. desert. C. wetlands. D. tropical rain forests. E. tropical oceans.
The two basic structural forms taken by most viruses are ____
a. polyhedral or enveloped b. helical or enveloped c. helical or polyhedral d. cylindrical or polyhedral e. cylindrical or enveloped
__________ and __________ are single-celled heterotrophs with a secreted shell. Fill in the blank(s) with the appropriate word(s)
Increased atmospheric CO2 is ________ the oceans, and it is expected to be detrimental to marine ________ such as corals, foraminifera, and coccolithophores
a. acidifying / calcifers b. neutralizing / silicates c. alkalizing / protists d. warming / algae