In an open system both energy and matter flow into and out of the system
Indicate whether the statement is true or false
TRUE
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Distinguish between a metal and a metal-containing compound.
A. Only one of these occurs naturally. B. Only one of these contains covalent bonds. C. There is no distinction between the two. D. Only one of these contains ionic bonds.
Prevailing views and concepts of nature have remained fairly constant since the Columbian Exchange
Indicate whether this statement is true or false.
A rock contains 12.5% of its orignal K40 (half life = 704 million years). How old is the rock?
- About 1,400 million years old
- About 2,100 million years old
- About 2,800 million years old
- About 700 million years old
Seed banks are important for ________
A) loans to developing countries to promote organic agriculture B) providing farmers with the current year's GM crops C) protecting genetic diversity D) protecting monoculture productivity E) agricultural investments in developing countries