How many total electrons are involved in a double bond, such as that found in a molecule of oxygen (O2)?
A) 1
B) 2
C) 3
D) 4
E) 6
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The second law of thermodynamics holds that
a. the energy of the universe is a constant. b. energy can be neither created nor destroyed. c. energy disperses spontaneously. d. energy transformations create a more orderly universe. e. energy and matter are the same thing
Humans intrude into the nitrogen cycle by
A. disposing of human manure rather than allowing it to recycle. B. manufacturing nitrogen compounds to apply to agricultural fields. C. using antibiotics that destroy important bacteria in the nitrogen cycle. D. tying up nitrogen in human body mass because of overpopulation.
The anterior pituitary __________.
a. stores and releases oxytocin and ADH produced by the hypothalamus b. produces releasing and inhibiting hormone c. is responsible for nervous and hormonal stimulation of the adrenal glands d. produces only tropic hormones e. receives releasing and inhibiting hormones from the hypothalamus through portal vessels connecting capillary beds
Neisseria gonorrhoeae is:
A. the cause of ophthalmia neonatorum. B. the cause of gonorrhea. C. called the gonococcus. D. virulent due to fimbriae and a protease that inactivates IgA. E. All of the choices are correct.