What is the Cambrian explosion? Is their appearance sudden? Why is it sudden, or why does it seem
so? What will be an ideal response?
The Cambrian explosion refers to the sudden appearance of new animals in the fossil record, animals
with skeletons. So many fossils appear rapidly because of the development of skeletons, which
fossilize much better. Also, these advances helped life to proliferate.
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A 2014 NASA's Goddard Space Flight Center study reminds us that ____.?
A) ?by increasing the per-capita depletion of nature, a collapse in civilization can be avoided B) ?Earth's natural replacement capacity is well below its total possible capacity C) ?civilizations are not permanent D) ?nature has a way of maintaining equilibrium on its own, thus allowing civilization to thrive indefinitely
A gust front within a multicell thunderstorm separates: a. rain from hail
b. cool, sinking air from warm, rising air. c. warm, sinking air from cool, rising air. d. None of these choices.
Describe dikes and sills using the appropriate terms from the following list: massive, discordant, tabular, and concordant
What will be an ideal response?
Some of the world's most economically and politically important countries lie in the European core, a zone stretching across northwest and north central Europe
a. True b. False Indicate whether the statement is true or false