Question

The number of embryo sac in an ovule is generally (1) One (2)Many (3)Four (4)Three

Answer 1

Answer: (1) One

Explanation:               PARTS OF OVULE

1) INTEGUMENTS : 1-2 protective layers of ovule.

2)MICROPHYLE : A small pore at one end of ovule through which the pollen tube enters.

3) NUCELLUS : Multilayered main body of ovule.

4) EMBRYO SAC : Present with in the nucellus and contains 8 cells.  

Answer 2

Answer:

The number of the embryo sacs in an ovule is generally one.

Explanation:

The ovule is the part of the flower that develops into a seed.

Parts of an Ovule:

The ovule is also known as the Integumented Indehiscent megasporangium and consists of the following parts:

1. Funicle: The stalk which attaches the ovule to the placenta.
2. Hilum: Junction/point of attachment between the ovule and funicle.
3. Integuments: These are the protective layers (one of two) surrounding the body of the ovule.
4. Micropyle: This is a small pore where the integuments are absent. The pollen tube enters the ovule (embryo sac) through this during fertilization.
5. Nucellus: This is the mass of tissue formed out of parenchymatous cells and forms the body of the ovule and is enclosed within the integuments.
   It may be well developed (Crassinucellate nucellus) or may be poorly developed (Tenuinucellate nucellus).
6. Embryo sac: It is the female gametophyte. Generally, plants contain one embryo sac per ovule formed from a megaspore.

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