Post-UTME Biology 2016 Objective — Question 9
Question 9 of 20 from the Post-UTME Screening (Post-UTME) Biology 2016 Objective paper, with the correct answer and a full explanation.
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The growth of pollen tube down the style to the embryo sac is an example of
- A. thigmotropism
- B. hydrotropism
- C. geotropism
- D. chemotropismCorrect
Explanation
The pollen tube grows in response to chemical signals released by the ovule, an example of chemotropism.
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