Which describes the direct change in genetic information of a cell?
a. chromosome
b. mutation
c. evolution
d. natural selection
e. heredity
b
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If the Moon is setting at noon, then it rose at
A) 6 A.M. B) 9 A.M. C) noon. D) 6 P.M. E) midnight.
Which expands more when the temperature is increased? Equal volumes of
A) iron. B) wood. C) ice water. D) helium. E) all expand the same
Suppose you place an object in front of a concave mirror. Which of the following statements must be true? (There could be more than one correct choice.)
A) The image of the object will always be smaller than the object. B) The image of the object will always be inverted. C) No matter where you place the object, a real image of the object will be formed. D) No matter where you place the object, the image of the object will always be virtual and upright. E) If you position the object between the mirror and the focal point of the mirror, its image must be upright and virtual.
In a reconstruction of Earth's geologic past, the continents of Africa and South America fit best along the
A) shorelines. B) continental shelves. C) continental slopes. D) ocean floors.