Biology 9700 · AS & A Level · Transport mechanisms

Transport mechanisms — practice question

A tree carries out photosynthesis and supplies organic compounds to other organisms in a forest. It removes carbon dioxide from the atmosphere and gives oxygen back to the atmosphere. It absorbs water from the soil through its roots and its leaves lose water to the atmosphere. Many other organisms live on the tree. Which term describes the tree?

  • Apopulation
  • Bcommunity
  • Cecosystem
  • Dtrophic level

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