Sexual reproduction in plants Quiz
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5 questions, one answer each
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1. A diploid plant has 2n = 24. How many chromosomes are in a generative nucleus?
- A. 6
- B. 12
- C. 24
- D. 48
2. Which structure controls the growth of the pollen tube?
- A. Generative nucleus
- B. Egg cell
- C. Tube nucleus
- D. Polar nucleus
3. What is the ploidy of the endosperm nucleus?
- A. Haploid
- B. Diploid
- C. Tetraploid
- D. Triploid
4. In an investigation, germination is highest at 10% sucrose and lower at 25%. What is the best explanation for the lower germination at 25%?
- A. Water leaves the pollen by osmosis because the solution has a lower water potential
- B. The pollen tube enzymes work faster
- C. The solution has a higher water potential than the pollen
- D. Meiosis is inhibited
5. Why is the micropyle important in fertilisation?
- A. It is the opening through which the pollen tube enters the ovule
- B. It stores food for the embryo
- C. It produces the male gametes
- D. It forms the seed coat