Question

During the process of nuclear type endosperm formation, what causes the free nuclei to be pushed to the periphery of the embryo sac?

Options

• Degeneration of the chalazal end

• Immediate cytokinesis following mitotic division

• Formation of a transverse wall separating chambers

• Formation of a large central vacuole

Answer 1

In nuclear type endosperm, the primary endosperm nucleus (PEN) divides mitotically without cytokinesis, producing many free nuclei in shared cytoplasm. A large central vacuole subsequently forms, pushing all nuclei to the periphery of the embryo sac.