Double fertilisation is a characteristic feature of
Answer and explanation
Correct answer: A. angiosperms
- Step 1: Double fertilisation is a unique reproductive adaptation in plants involving two male gamete fusion events within the embryo sac.
- Step 2: One sperm cell fuses with the egg nucleus to yield the diploid zygote (), while the second sperm cell fuses with the central polar nuclei to produce the triploid endosperm ().
- Step 3: This dual fertilisation mechanism is exclusive to angiosperms (flowering plants) and absent in gymnosperms, pteridophytes, and bryophytes.
Answer
angiosperms.
Why not the others: bryophytes (mosses and liverworts) lack vascular tissue and endosperm, undergoing single fertilization that yields a diploid sporophyte; gymnosperms (conifers and cycads) exhibit single fertilization and form a haploid endosperm tissue derived from the female gametophyte; pteridophytes (ferns) possess vascular systems but reproduce via free-swimming flagellated sperm undergoing single fertilization.
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