What is the thalweg?
A. the straightest part of a channel
B. the fastest part of a channel
C. the deepest, fastest part of a channel
D. the deepest part of a channel
E. the shallowest part of a channel
C
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Since levees can protect many areas during floods, why are they controversial? What will be an ideal response?
Why do humid tropical regions have only small variations in temperature throughout the year?
A) The canopy of trees in the rain forest shade the ground and reflect light all the time. B) The cloud cover and rain do not allow the temperatures to rise or fall significantly. C) The winds associated with these systems rapidly redistribute the heat. D) The location of this climatic region is limited to an area where the solar radiation does not vary significantly. E) The constant humidity maintains a relatively uniform temperature.
Index fossils like Paradoxides are widespread geographically but limited to a short span of geologic time.
a. true b. false
Recent research suggests that ________ has/have contributed to the large drop in fertility rates in Brazil over the past several decades
A) exposure to environmental estrogens B) laws preventing women from having more than one child C) AIDS and malaria D) soap operas E) legalization of abortions