What embryo sac means?

Explanation: The embryo sac represents female gametophyte or megagametophyte. The functional megaspore develops into the embryo sac. Ovules represent the megasporangium and ovules are borne on megasporophyll. The female gamete is known as an egg.

What is the embryo sac called?

SEED DEVELOPMENT | Endosperm Differentiation The megagametophyte, or embryo sac, is situated within the body of nucellus parenchyma cells, which are covered by the integuments (Figure 1A).

What is embryo sac and ovule?

Embryo sac is a part of ovule. Ovule is a minute structure in seed plants, containing the embryo sac and surrounded by the nucellus, that develops into a seed after fertilization. Ovule gives rise to and contains the female reproductive cells.

Which is the largest cell of embryo sac?

The central cell
The central cell is the largest cell of this very long embryo sac. The fused nucleus is close to the egg apparatus before fertilization and displays a remarkable chalazal migration after gamete delivery.

Is embryo sac also called Megaspore?

The embryo sac is nothing but the female gametophyte which is also called the megagametophyte. The egg cells are produced inside this embryo sac.

How many types of embryo are there?

There are many different types of embryo transfers: fresh, frozen, cleavage (day 3), blastocyst (day 5), single, and multiple embryo transfers.

What is male gametophyte?

Male Gametophyte: Plants show alternation of generation, which alternate between the diploid sporophyte and the haploid gametophyte. A mature male gametophyte in angiosperms is a pollen grain that comprises a 3-celled structure, while a female gametophyte is an embryo sac which is a 7-celled structure.

What are Megagametophyte and microgametophyte?

each microspore develops into a microgametophyte (male gametophyte), which ultimately produces male gametes (sperm), and each megaspore produces a megagametophyte (female gametophyte), which ultimately produces female gametes (eggs). Fusion of an egg and a sperm creates a zygote and restores the 2n ploidy level.

Is embryo and ovule same?

The male gametophyte (pollen or microgametophyte) develops within the anther, whereas the female gametophyte (embryo sac or megagametophyte) is a product of the ovule. The ovule is the source of the megagametophyte and the progenitor of the seed.