alleryStart learning →Which event of the angiosperm life cycle is completely absent in gymnosperms?
AAlternation of generations
BPollen tube formation
CDouble fertilisation
DMeiosis in the sporangium
Answer & Solution
Correct answer: C. Double fertilisation
1. Gymnosperm reproduction differs from angiosperm reproduction in several ways.
2. Double fertilisation is a key event in the angiosperm life cycle and is completely absent in gymnosperms.
3. In a gymnosperm the generative cell splits into two sperm nuclei, one fuses with the egg and the other simply degenerates.
4. Alternation of generations occurs in both groups, so it cannot be the distinguishing event.
5. Pollen tubes form in both groups as well, though the gymnosperm tube grows far more slowly.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 32 "Plant Reproduction", section 32.1 Reproductive Development and Structure_
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