Short answerModerate1 mark
1(h)
The diagram given below represents a plant movement. Answer the following questions: The diagram given below represents a plant movement. Answer the following questions:
Label the part marked ‘A’.
Topic: Pollen tube
Previous-year question practice database
Answer
Exam answer
POLLEN TUBE.
Explanation
The pollen tube grows out of a pollen grain that has landed on the stigma, and carries the male gametes down through the style to the ovule.
Identify it in a diagram by what it connects: it begins at the STIGMA at the top and grows downward through the STYLE towards the OVARY.
It exists because plant gametes cannot move on their own — so instead of the gamete travelling to the ovule, the plant grows a tube to deliver it.
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