Chapter 178 of 2363 min read
Pollination and double fertilisation
Why this is asked: "Triple fusion" names one single fusion event involving three haploid nuclei — one male gamete plus both polar nuclei — not three separate fusions, and it's this event, not syngamy, that produces the triploid primary endosperm nucleus.
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- •Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Both wind- and water-pollinated flowers are not very colourful and do not produce nectar. Reason (R): Wind- and water-pollinated flowers produce an enormous amount of pollen grains. In the light of the above statements, choose the correct answer from the options given below:
- •Identify the correct description of the given figure:
- •Identify the set of correct statements: A. The flowers of Vallisneria are colourful and produce nectar. B. The flowers of water lily are not pollinated by water. C. In most water-pollinated species, the pollen grains are protected from wetting. D. Pollen grains of some hydrophytes are long and ribbon-like. E. In some hydrophytes, the pollen grains are carried passively inside water. Choose the correct answer from the options given below:
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