The most common number of carbons in fatty acid hydrocarbon chains of membrane phospholipids is
A) 7.
B) 10.
C) 16.
D) 19.
E) 24.
C) 16.
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Sperm cells are indicated by the letter ____
a. A b. B c. C d. D e. E
One sign of yellow fever is that the whites of the eyes and the skin gain a yellowish tint. Given just this information, you can surmise that the cells of which organ are most likely being destroyed?
A) eyes B) liver C) stomach D) pancreas
The function of which household appliance accurately describes the removal of neurotransmitters from the synapse?
A) blender B) toaster C) vacuum cleaner D) coffee grinder
Phil is conducting a seed germination experiment. He places three groups of lettuce seeds in a 34º Celsius incubator with adequate moisture. One set of seeds is placed in a dark area with no light source. A second set is placed under artificial light, and third set of seeds is placed in direct sunlight. This experiment is intended to test Phil's hypothesis that light is necessary for lettuce seed germination.Based on the experimental design, which variable was the control?
A. germination rate B. moisture C. type of light D. temperature E. seeds in the dark