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Question 108

A gardener claims that pollination and fertilisation are two words for one and the same event. Which correction of that claim about flowering plants is right?

  1. They are the same event, so the two words are interchangeable
  2. They are different events, and fertilisation always comes before pollination
  3. They are different events, but pollination always leads on to fertilisation
  4. They are different events: pollen is transferred, then nuclei joinCorrect answer

Explanation

Two things have to happen in a fixed order: pollen must first arrive on the receiving surface, and only then can a nucleus from that pollen reach an ovule and unite with it. The order cannot be turned round, and arrival guarantees nothing, because pollen may land on a flower of the wrong kind or the tube may never reach an ovule.

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Question 108: A gardener claims that pollination and fertilisation are… · Plants and Photosynthesis · Questena