fusion of 4 or more polar nuclei and the second male gamete only
fusion of 2 polar nuclei and second male gamete only
fusion of one polar nucleus and second male gamete only
all the above type of fusions in different types of angiosperms
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The Correct Option isB
Solution and Explanation
Nawaschin $(1898)$ was first to show that both the male gametes released by a pollen tube are involved in fertilization. Nucleus of one gamete fuses with egg nucleus (syngamy). Nucleus of the other gamete fuses with the polar nuclei or their fusion product (secondary nucleus). Most of the plants have two polar nuclei; hence second fertilization involves the fusion of three nuclei (triple fusion).
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Top Questions on sexual reproduction in flowering plants
Sexual reproduction in flowering plants takes place or happens when the production of a new organism occurs from two parents by making use of their gametes or sex cells. Both sexual and asexual reproduction can be found in plants. Nearly all flowering plants reproduce sexually. Flowers play a captious role in the process as it carries both the male and female reproductive parts commonly known as androecium and gynoecium respectively.
An individual flower comprises the following parts -
