A student observers melting crayons. Which of the following describes what they saw? A. A chemical change. B. A physical change. C. A physical property. D. A chemical property

Which of the following is a good definition for the word adaptation? question 1 options: a trait that an organism survive and reproduce in its environment. a change in an organism's environment. the way in which animals obtain food. a temperature change that can cause the extinction of plants and animals.

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Which rate indicates the number of children that would be born per women if she were to live to the end of her child-bearing years