Zaymiey

🔬 Biology  ·  Sexual Reproduction in Flowering Plants  ·  NEET

Double fertilization is unique to:

Answer: Angiosperms (flowering plants).

  • A Gymnosperms such as pine and cycads
  • B Ferns that reproduce via free-living gametophytes
  • C Angiosperms (flowering plants)
  • D Mosses with a dominant gametophyte generation

Correct answer: C. Angiosperms (flowering plants)

Explanation: Double fertilization: unique to angiosperms. One sperm fertilizes the egg (→ zygote); another fuses with two polar nuclei (→ triploid endosperm).

Double fertilization: pollen tube delivering two male gametes to the embryo sac, forming zygote and endosperm

Double fertilisation in angiosperms: one male gamete fuses with the egg to form the diploid zygote (syngamy), while the second fuses with the two polar nuclei to form the triploid primary endosperm nucleus (triple fusion). Image: Triploid, CC BY 3.0, via Wikimedia Commons.

Concept context

Flower structure, pollination, double fertilization, and seed/fruit development - the highest-scoring Class 12 biology chapter in NEET.

Read the full Sexual Reproduction in Flowering Plants notes →