Synthetic ________, such as 2,4-D, are routinely used to control weeds and are applied in concentrations higher than would occur in the plant tissues.
A. ethylene
B. auxins
C. gibberellins
D. cytokinins
Answer: B
Biology & Microbiology
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Uracil is found in ___________
a. both DNA and RNA b. only in RNA c. only in DNA
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Which of the following is NOT a general category of cell signaling molecules?
Endocrine signaling Enzymatic signaling Paracrine signaling Synaptic signaling
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Cells that produce a lot of lipids for membranes would have an enlarged
A. rough ER. B. mitochondrion. C. nucleus. D. Golgi body. E. smooth ER.
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Four of the following are shared characteristics of parabasalids and diplomonads. Which is the exception?
A. Heterotrophic B. Flagella C. Oxygen-poor or anaerobic habitats D. Abundant mitochondria E. Live in animals
Biology & Microbiology