What is the process involved with nitrifying bacteria?
a. nitrite ? nitrate
b. nitrate ? nitrite ? nitrogen gas
c. nitrate ? ammonia
d. urea ? ammonia
e. nitrogen gas ? ammonia
a
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If a patient is missing B and T cells, what would be absent from the immune response?
A) memory B) lysozymes C) cytokines D) defense against bacteria
What region in eukaryotic genes usually contains the majority of regulatory elements?
A. 0 to 50 B. -50 to 0 C. -50 to -100 D. -100 to -150
What would happen if you injected a calcium-channel blocking chemical into a muscle cell?
A. It would be unable to communicate with nerves. B. It would be unable to contract. C. It would relax more slowly. D. It would die. E. It would divide.
During the luteal phase a low level of progesterone and estrogen will bring about
A. a spike of the luteinizing hormone causing the oocyte to be ovulated. B. the enlarging of the breast tissue in order to prepare for lactation. C. the development of a secondary oocyte. D. the disintegration of the endometrium and the rupturing of the blood vessels. E. the thickening of the endometrial lining in preparation for the implantation of a zygote.