Which of the following is a principle of natural selection? a) most organisms are infertile or produce nonviable offspring. b) members of a species are genetically identical. c) variations are acquired during an individual's lifetime and so are not passed to offspring. d) variations allow individuals to survive and reproduce better than members who lack these variations.

Astudent completed a lab report. which correctly describes the difference between the “question” and “hypothesis” sections of her report? “question” states what she is asking, and “hypothesis” states the result of her experiment. “question” states what she is asking, and “hypothesis” states what she thinks the answer to that question is in “if . . then . . because” format. “question” describes what she is trying to find out, and "hypothesis" states the procedures and methods of data collection. “question” describes what she is trying to find out, and “hypothesis” states any additional information or prior knowledge about the question.