A compound similar to auxin, 2,4,5-trichlorophenoxyacetic acid (2,4,5-T), has been used
A. as a fertilizer for corn and wheat.
B. an herbicide for killing woody seedlings and dicot weeds.
C. to detoxify the dangerous poison dioxin.
D. as a spray to promote flowering of pineapple.
E. as an organic substitute for chlorine bleach.
Answer: B
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The process of moving water through a plant by transpiration works because water molecules stick to each other with
A. turgor pressure. B. osmosis. C. ionic bonds. D. adhesion. E. hydrogen bonds.
Which of the following is not a major class of growth factors?
A. Nucleic acids B. Amino acids C. Purines and pyrimidines D. Vitamins
Cells get their energy from the ________ of molecules, such as ATP, that store energy
Fill in the blank(s) with correct word
Quinolones like ciprofloxacin inhibit DNA gyrase and topoisomerase IV and thus
a. interfere with unwinding of DNA during replication. b. result in the ribosome misreading mRNAs. c. lead to pore formation and depolarization of the cell membrane. d. cause a shortage of peptidoglycan precursors that weakens the cell wall, leading to lysis.