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The diagram above is an illustration of two plants P and Q. Arrows I, II and...

Biology
WAEC 2024

The diagram above is an illustration of two plants P and Q. Arrows I, II and III illustrate the transfer of pollen grains among flowers of plants P and  Q. Studly it and answer questions 17 and 18.

The types of pollination illustrated as I,Il and III, respectively are 

  • A. cross, self and cross
  • B. self, self and cross
  • C. self, cross and self
  • D. self, cross and cross
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Correct Answer: Option B
Explanation

I - Self pollination

II - Self pollination

III - Cross pollination

Self-pollination occurs when pollen grains are transferred from anther to the stigma within the same flower(as seen in I) or plant(as seen in II), while cross-pollination occurs when pollen grains are transferred from the anther of a plant to the stigma of another plant of the same species(as seen in III). 


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