Identify the role of water in photosynthesis
A) It is split to form sugar.
B) It is the final electron acceptor.
C) It is a waste product in the light reactions.
D) It is the initial electron releaser when split.
D
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The process in which NH4+ is oxidized to NO3- is called ____
a. nitrification b. ammonification c. nitrogen cycling d. nitrogen fixation e. nitrogen assimilation
Most biological molecules are joined by
A) hydrogen bonds. B) peptide bonds. C) covalent bonds. D) ionic bonds. E) disulfide bonds.
The earliest vascular plants on land had underground stems (rhizomes) but no roots. Water and mineral nutrients were most likely obtained by _____
A) diffusion through stomata B) absorption by mycorrhizae C) osmosis through the root hairs D) diffusion across the cuticle of the rhizome
A few species of actinomycetes have been found to be pathogenic in humans, other animals, and plants.
Answer the following statement true (T) or false (F)