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Sexual Reproduction In Flowering Plants

Question
CBSEENBI12047144

The formation of gametophyte, from sporophyte, without spore formation or without meiosis is known as :

  • apospory

  • apogamy

  • parthenogenesis

  • none of these

Solution

A.

apospory

Apospory is the development of gametophyte from a cell of the sporophyte without the intervention of spore. The structure taking part in apospory may be single cell of gametophytic nature, a rhizoid or a gametophyte bearing sex organ or of sporophytic in nature.

Apogamy is a type of plant reproduction in which sporophyte (diploid phase) is produced from the gametophyte (haploid phase) without fertilization. It occurs in some type of ferns.

Parthenogensis is a type of reproduction from an ovum without fertilization. It can operate on either a haploid or a diploid cell.