Given a scientific passage and an answer, generate a question for the given answer.
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Question: Passage: Carbon moves through ecosystems in two cycles that overlap. In the biotic cycle, it moves between living things and the air. In the abiotic cycle, it moves between the air, ground, and oceans. By burning fossil fuels, humans have increased the amount of carbon dioxide in the air. Answer: biotic cycle

Answer: In what part of the carbon cycle does carbon move between living things and the air?

Question: Passage: The nucleus is an example of an organelle . An organelle is any structure inside a cell that is enclosed by a membrane. Eukaryotic cells may contain many different organelles. Each does a special job. For example, the mitochondrion is an organelle that provides energy to the cell. You can see a mitochondrion and several other organelles in the animal cell in Figure above . Organelles allow eukaryotic cells to carry out more functions than prokaryotic cells can. Answer: an organelle

Answer: Any structure inside a cell that is enclosed by a membrane is called?

Question: Passage: Plants provide many products for human use. They include timber, medicines, dyes, oils, and rubber. Answer: plants

Answer:
Timber, medicines, dyes, oils, and rubber are just some of the useful products humans derive from what?