Formative Practice 6.2 (Form 5 Biology Textbook Exercise and Answer)

Question 1:
Name the cell that differentiates to form:
(a) Pollen grains in the anther
(b) Embryo sac in the ovary

(a) Microsphore mother cell

(b) Megaspore mother cell

Question 2:
In the formation of pollen grains, the nucleus in the pollen will divide by mitosis to form two nuclei. Justify.

Produces two nuclei, namely the generative nucleus and the tube nucleus. The tube nucleus forms pollen tube whereas the generative nucleus divides mitotically in the pollen tube to form two male gametes.

Question 3:
What is the importance of meiosis in the formation of pollen grains and cells of the embryo sac?

Produces gametes which are haploid

Question 4:
After the formation of embryo sac is completed, this cell contains eight nuclei.
Name the nuclei.

3 antipodal cells, 2 polar nuclei, 1 egg cell, 2 synergid cells

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