Biology-Ecology

posted by Amy

Multiple choice:
For a natural ecosystem to be self-sustaining,
many compounds must be:
1. converted into new forms of energy.
2. cycled between organisms and the environment.
3. permanently removed from the environment.
4. changed into fossil fuels such as oil and
coal

  1. Rawr

    2: cycled between organisms and the environment

    The compounds must be taken in by consumption, and then recycled back through decomposition.

  2. maiaylah

    cycled between organisms and the environment

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