Practice question

Based on the photosynthesis passage, why is photosynthesis described as essential to most life on Earth?

  1. It produces oxygen that organisms need and forms the base of the food supply
  2. It cools the planet's atmosphere
  3. It removes all carbon from the soil
  4. It allows plants to move from place to place

Answer: A — It produces oxygen that organisms need and forms the base of the food supply

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