For growth, most bacteria require water activity levels above
A. 1.00.
B. 0.80.
C. 0.70.
D. 0.90.
D. 0.90.
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Recent theories on the biological need for IgE as an:
A. Apoptosis causing agent B. Antiviral agent C. Antibacterial agent D. Antifungal agent E. Anti-helminthic
Red-green color blindness is an X-linked recessive trait in humans. A color-blind woman and a man with normal vision have a son. What is the probability that the son is color blind?
A) 75 percent B) 50 percent C) 25 percent D) 0 percent E) 100 percent
The situation in which an active regulatory protein "turns off" gene expression is an example of
A) a mutation. B) positive control. C) negative control. D) constitutive gene elements. E) unique regulation.
Which receptor type makes you aware that your appendix is inflamed?
a. mechanoreceptors b. photoreceptors
c. chemoreceptors d. thermoreceptors e. nociceptors