Outgoing messages are conducted by
a. an axon.
b. any process that is long enough to reach the receptor.
c. numerous dendrites.
d. the intervention of the neuroglia.
e. chondrocytes.
A
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Nitrate (NO3-) reduced into ammonia (NH3) to produce energy for the cell is called
A) ammonification. B) dissimilative reduction of nitrate to ammonia (DRNA). C) nitrification. D) redox.
Anabolic-androgenic steroids are ____
a. synthetic forms of testosterone b. synthetic forms of estrogens c. used to treat early puberty d. natural variants of testosterone e. natural variants of estrogen
Almost immediately after a young leaf primordium first begins to bulge out
a. undifferentiated vascular tissues that will later become xylem and phloem penetrate it. b. small xylem vessels penetrate it first, followed soon after by phloem. c. small phloem vessels penetrate it first, followed soon after by xylem. d. small xylem and phloem vessels penetrate it together. e. specialized vascular tissue cells penetrate and soon differentiate into phloem or xylem vessels.
What is the first step in the Calvin cycle?
a. O2 attaches to CO2. b. O2 attaches to G3P. c. CO2 attaches to RuBP. d. CO2 attaches to Rubisco. e. CO2 attaches to phosphoglycerate.