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Q.
In the given diagram, $X$ represents
Sexual Reproduction in Flowering Plants
Solution:
Nuclear endosperm $(X)$ is the most common type of endosperm. It is named so because it contains free nuclei in the beginning. The primary endosperm nucleus divides repeatedly without wall formation to produce a large number of free nuclei. Meanwhile central vacuole appears in the central cell and pushes the cytoplasm containing the nuclei to the periphery. The cytoplasm thickens so that the vacuole decreases in size. It ultimately disappears with the exception of a few cases. The multinudeate cytoplasm undergoes cleavage and gives rise to a multicellular tissue, e.g., maize, wheat, rice, sunflower, Capsella bursa-pastoris.
