What is hypoxia?
a. The increase of carbon dioxide in an area
b. The depletion of free oxygen in an area
c. The depletion of nutrients in an area
d. The increase of nitrogen in an area
e. The increase of free oxygen in an area
b
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In the Chapter 2 Investigation (Evaluating Solar Energy), which of the following is true about the downward shortwave radiation flux near South America?
A) It was relatively constant as a function of latitude B) It was relatively constant as a function of longitude C) It was affected by ocean currents and topography D) It did not vary much from place to place
Latin America and the Caribbean as used in this text include the country of Mexico
Indicate whether the statement is true or false
The only geologic event known to correlate with the P-T mass extinction is an asteroid impact.
Answer the following statement true (T) or false (F)
Features of hominins, such as large brain size and bipedalism, developed in response to ____
a. improved ability to hunt b. cooling climate c. increased predation d. warming climate e. an expanding habitat