Answer: Wings, tufts of hair (pappus), or lightweight seeds.
- A Hooks and spines that cling to animal fur
- B Wings, tufts of hair (pappus), or lightweight seeds
- C Fleshy, sugar-rich fruits that attract birds
- D Hard, woody shells that float on water currents
Correct answer: B. Wings, tufts of hair (pappus), or lightweight seeds
Explanation: Wind-dispersed seeds have adaptations: wings (maple, ash), pappus/tufts (dandelion, thistle), lightweight seeds. Travel long distances.
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.
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