Which statement describes the relationship between plants, animals, and the carbon cycle? a. plants use carbon and release oxygen, and animals release carbon and use oxygen. b. animals use carbon and release oxygen, and plants release carbon and use oxygen. c. animals use carbon through respiration, and plants fix carbon through photosynthesis. d. plants use carbon when they decompose, and animals release carbon when they decompose.
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Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled
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Which description shows competition in an environment? an organism that feeds on some food an organism that finds a place to sleep three organisms of the same species living in an area three organisms battling over limited resources
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Which statement describes the relationship between plants, animals, and the carbon cycle? a. plants...
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