About how many days into a woman's cycle does it typically take for a mature follicle to burst?
A. 7
B. 14
C. 21
D. 28
Ans: B. 14
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The resting potential across a typical neuron membrane is approximately ____ inside relative to outside.
A. ?70 microvolts B. ?70 millivolts C. ?70 volts D. +70 millivolts E. +70 megavolts
The production of light by an organism is called ____.
A. autophotoproduction B. bioluminescence C. luminarianism D. autoillumination E. bioillumination
The main effect of burning peat, wood, coal, and petroleum on the Earth's climate is:
A. The fires significantly heat the air and cause a rise in global temperature. B. The smoke blocks sunlight from reaching the Earth and causes a significant lowering of the Earth's temperature. C. The fires release back into the atmosphere carbon dioxide that was once taken from the atmosphere by plants and stored in their own tissues; the increased carbon dioxide holds in solar heat and causes a rise in temperature. D. The rising heat from fires produces wind that cools the surface of the Earth. E. The fires use up oxygen that would otherwise block penetration of ultraviolet light from reaching the Earth; the increased ultraviolet radiation heats the Earth.
A type of gland that secretes an oily substance that softens and protects hair is a(n) _____ gland.
A. salivary B. mammary C. sweat D. sebaceous E. endocrine