Within a single motor neuron, what direction does an impulse follow?
a. dendrite ? axon ? cell body
b. axon ? dendrite ? cell body
c. dendrite ? cell body ? axon
d. cell body ? dendrite ? axon
e. cell body ? axon ? dendrite
ANSWER: c
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A mixture of vegetable oil and water will separate into layers because oil is ____ and forms ____
a. hydrophobic; nonpolar associations b. hydrophilic; nonpolar associations c. hydrophilic; polar associations d. hydrophobic; polar associations e. hydrophobic; ionic associations
Why are tropical waters so blue?
a. Higher density of water b. Large bacteria populations c. High mineral content d. Low primary productivity
When atmospheric CO2 concentrations decrease, the ________ cycle gives C4 plants an advantage over C3 in carbon fixation
Fill in the blank with correct word.
Which of the following has increased as a direct result of stratospheric ozone depletion?
a. CO2 b. UVB c. CFCs d. nitrous oxides e. sulfur oxides