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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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?

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