Question

What is the structure of an ovule? ​

Answer 1

Answer:

Answer:In seed plants, the ovule is the structure that gives rise to and contains the female reproductive cells. It consists of three parts: The integument, forming its outer layer, the nucellus (or remnant of the megasporangium), and the female gametophyte (formed from a haploid megaspore) in its center. The female gametophyte — specifically termed a megagametophyte— is also called the embryo sac in angiosperms. The megagametophyte produces an egg cell for the purpose of fertilization.

Answer 2

Structure Of An Ovule

• Ovule is globular structure developed in the placenta within ovary which has to developed in to seed at maturity.

• A mature ovule has a stalk called funiculus or funicle.

• The point at which the body of ovule is attached to the stalk is called hilum.

• A typical ovule is inverted and it is called anatrophous ovule.

• The parenchymatous cells inside the ovule is called nucellus.

• This is enclosed by one or two covering called integuments.

• The basal part of the ovule from where the integuments originate is called chalaza.

• There is a narrow pore in the integument called micropyle.

• In the nucellus there is a large embryo sac.

• At the micropylar end of the embryo sac there is three celled egg apparatus.

• At the chalazal end there are three antipodals.

• A diploid secondary nucleus is seen at the centre of the embryo sac.