Dinosaurs reached their peak of success at which period?
a. Permian period
b. Triassic period
c. Jurassic period
d. Cretaceous period
Answer: d. Cretaceous period
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Describe and discuss the marine communities of the Ordovician, Silurian, and Devonian. How do they compare with
present-day marine communities? What will be an ideal response?
The minimum temperature usually occurs near sunrise because:
A) atmospheric path is longest. B) reflection of solar radiation is a maximum. C) the Sun angle is lowest then. D) Earth experiences a net loss of radiation until then.
The English-only movement advocates a federal mandate that would require the use of only English in U.S. documents. What are the various positions in this debate?
What will be an ideal response?
Crude birth rates are measured in terms of the number of children born
A. In a single year B. Per family C. Per 1,000 people in the general population D. Per 1,000 people each year E. Per family per year