Question

Which of the statements about the life cycle of flowering plants is false?

the haploid gametophyte produces gametes by mitosis

two sperm fertilize an egg to produce a zygote

the diploid sporophyte produces spores by meiosis

microspores and megaspores go through mitosis to produce gametophytes

sporophytes are much larger than gametophytes

Answer 1

Flowering plants refers to the Angiosperms. In Angiosperms, sporophyte is the dominant stage and from which spores or seeds are formed by normal mitosis.

Gametophyte is the haploid stage, which is dependent on the sporophyte stage.

The female gametophyte is the embryosac and the male gametophyte is the pollen grain, both of which contain female and male gametes respectively.

These gametes from the gametophyte are produced by mitosis and spores are produced from sporophyte by meiosis.

After formation of micro and macro spores, their respective gamwtohytes are produced by mitosis.

Pollen grain contains two sperm or two male gametes. Upon entry into embryosac, only one sperm fuses with the egg cell and the other male gamete fuses with polar nuclei.

So, 'the two sperm fertilize egg cell" (second option) is the correct answer.