Variation in expressivity and penetrance of genes is due to the effects of other genes and the
environment. Indicate whether the statement is true or false.
T
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Contrast fermentation and respiration in terms of electron donor, electron acceptor, type of ATP production, and relative number of ATP produced
What will be an ideal response?
The only virus that has been globally eradicated is:
a. chicken pox. b. cowpox. c. smallpox. d. swinepox.
In some cases, just a few hormone molecules binding to the surface of a cell can trigger a very large response because ____.
A. the signal is amplified by activation of transcription factors that each catalyze multiple reactions B. each hormone can bind to multiple receptors simultaneously causing amplification of the signal C. the signal is amplified by activation of enzymes that each catalyze multiple reactions D. each hormone can bind to transcription factors simultaneously causing amplification of the signal E. the hormone triggers the cell to release more hormones, amplifying the signal
The producers in hydrothermal vent communities are
A) coral. B) zooplankton. C) kelp. D) phytoplankton. E) sulfur bacteria.