Why can volcanic rocks occasionally contain fossils?
A) Lava does not melt bones.
B) Volcanic ash, if builds quickly enough, can preserve the remains of organisms.
C) Magma cools so quickly that fossils get trapped inside.
D) Organisms were often attracted to volcanoes and fell inside them by accident.
Answer: B
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An arrangement whereby firms based in advanced industrial countries provide design specifications to producers in less developed countries is called ________ ________
Fill in the blank(s) with correct word
Recent research indicates that the variation in solar output ________
A) will increase by a hundredfold over then next century B) has a radiative force of 20 watts/m2 C) is greater than all the anthropogenic factors affecting climate change D) is less than any of the anthropogenic factors affecting climate change E) is the major factor driving temperature change
Which of the following types of population curves would best represent a group of elephants that enter a new, open habitat and become a stable part of that ecosystem?
A. Norm-shaped curve B. J-shaped curve C. S-shaped curve D. Cyclic oscillation-shaped curve E. Survivorship curve
Excessive groundwater withdrawals can cause ________.
a.) an influent stream to become an effluent stream b.) expansion of the dewatered aquifer c.) the water table to drop or decline in elevation d.) porosity in the aquifer to increase as the water is removed