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Question 120

Why does a seed buried in dark soil still need oxygen in order to germinate?

  1. It respires, and respiration releases stored energyCorrect answer
  2. It needs oxygen for photosynthesis while it is underground
  3. It uses oxygen to soften and split its seed coat
  4. It does not need any oxygen while it is in the dark

Explanation

Releasing the energy locked up in the seed's reserve requires its cells to respire, and respiration in a seed consumes oxygen exactly as it does in any other living tissue. Photosynthesis is impossible in the dark and would release oxygen rather than use it up, so it cannot be the reason a buried seed fails without air.

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Question 120: Why does a seed buried in dark soil still need oxygen in… · Plants and Photosynthesis · Questena