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Sexual Reproduction In Flowering Plants

Question
CBSEENBI12047505

Following are the statements regarding sexual reproduction in flowering plants.

I. Parthenium is a plant that causes pollen allergy.

II. If tapetum is destroyed, then unfeasible male gametophytes are produced.

III. Egg apparatus has 3 synergids and 2 antipodal cells.

IV. Megaspore is the first cell of gametophytic generation.

Choose the incorrect option.

  • I and II

  • II and III

  • III and IV

  • I and IV

Solution

C.

III and IV

Statement I and II are correct. 

As the pollens of Parthenium plant can cause pollen allergy. The malfunctioning of tapetum does not nourish the developing pollen grains, thus fails to produce viable male gametophyte. In an embryo sac, there are 2 synergids + 3 antipodal cells + 1 egg cell and 1 polar nuclei. Microspore or pollen grain is the first cell of gametophytic generation.