Which of the following characteristics of the Earth are essential to the existence of life? Characteristics 2 and 4
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Characteristics 1, 2, and 4
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Characteristics 2, 4, and 5
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Characteristics 1 and 3

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How does a scientist the government? a. the scientist tells people in society what to do. b. the scientist determines the policies that the government spends money on. c. the scientist provides unbiased information to the government. d. the scientist makes laws based on his or her research results.

What overall charge must all compounds have

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.