As one approaches the equator, the angle of incidence ________ and the atmosphere attenuation ________.
A. increases; decreases
B. decreases; increases
C. decreases; decreases
D. increases; increases
Answer: A
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Pesticide-resistant insects develop from the widespread use of insecticides because
A) pesticides cause mutations in the insects that make them resistant. B) pesticides increase the biotic potential of some insects. C) insects learn to avoid the places where insecticides have been applied. D) over many generations, the naturally resistant pests survive and increase in number.
A type I survivorship curve, with higher death rates at older ages, is typical of ________
A) redwood trees B) dandelions C) large open-water ocean fish, such as tuna D) large mammals such as gorillas E) large reptiles such as alligators
The circle of illumination at all times during the year:
a. divides Earth between equal halves of lightness and darkness. b. divides Earth into eastern and western halves. c. separates winter from summer d. divides the northern and southern hemispheres.
The very large, lava-covered areas of the Moon are called maria
Indicate whether the statement is true or false