Question

In plants the fusion of male gamete with secondary nucleus result is
A) Embryo sac
B) Endosperm
C) Cotyledons
D) Spores

Answer 1

Hint: The male gametes are provided in the anther they are present within the pollen grains. Secondary nucleus is basically a diploid nucleus which is formed by the fusion of two polar nuclei.

Complete Answer:
 Fertilization is particularly complex in flowering plants (angiosperms). Sperm cells of angiosperms have lost their motility and require transportation as a passive cargo by the pollen tube cell to the egg apparatus (egg cell and accessory synergid cells). Sperm cell release from the pollen tube occurs after intensive communication between the pollen tube cell and the receptive synergid, culminating in the lysis of both interaction partners.

Following release of the two sperm cells, they interact and fuse with two dimorphic female gametes (the egg and the central cell) forming the major seed components embryo and endosperm, respectively. This process is known as double fertilization. Here, we review the current understanding of the processes of sperm cell reception, gamete interaction, their pre-fertilization activation and fusion, as well as the mechanisms plants use to prevent the fusion of egg cells with multiple sperm cells.

The female gametophyte, or embryo sac, develops within the maternal organ called the ovule after three additional mitotic nuclear divisions of the functional megaspore

Therefore, from the above explanation the correct option is B).

Note: Endosperm is a food reserve tissue inside the seeds of most flowering plants. It surrounds the embryo and provides nutrition in the form of starch. It may also contain oils and protein. The endosperm of cereal plants is an important source of nutrition for humans.