For a typical flowering plant, how is the first cell of the triploid (3n) endosperm formed from?

Question

Quizplus · Accepted Answer

The first cell of the triploid endosperm is formed by the fusion of one sperm with the central cell, which contains two polar nuclei. This results in a triploid (3n) cell, which will later develop into the endosperm, providing nutrients for the developing embryo. Option A is incorrect, as antipodal cells are not involved in the formation of the endosperm. Option B is incorrect, as fertilization of the synergid results in the formation of the zygote, not the endosperm. Option D is incorrect, as both sperm cannot fertilize the egg, which would lead to a tetraploid (4n) embryo.

For a Typical Flowering Plant, How Is the First Cell