Outnumbering neurons by up to 50 to 1, which cells protect, insulate, and reinforce neurons?
A) sensory cells
B) motor cells
C) satellite cells
D) supporting cells
D
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When cancer cells have the ability to migrate to other parts of the body, they are said to be
A. invasive. B. benign. C. metastatic. D. oncogenic. E. genetic.
If you rub the scaled skin of a shark, it feels rough when you move your hand from tail to head but smooth when you move from head to tail. What is a major advantage of the scales being oriented this way?
A. To better prevent water loss from the body tissues B. To enable the shark to orient itself in space and detect prey C. To keep the shark afloat in the water D. To better protect the shark from predators E. To counteract friction as the shark swims through the water
A kilowatt, a unit of electrical power, is
a. 10 watts. b. 100 watts. c. 1000 watts. d. 1,000,000 watts.
You construct two species-area relationships for terrestrial plants, modeling both with the relationship log S = log c + z log A. One relationship is for data collected from islands of different sizes. The other is for data collected from continental areas over a similar size range. Which of these relationships is likely to have the greater slope, z?
A) the one for islands B) the one for continental areas C) neither A nor B