Thank you for reporting, we will resolve it shortly
Q.
Ovule is technically equivalent to the
NTA AbhyasNTA Abhyas 2020
Solution:
Ovule is the integumented megasporium in angiosperms and is present inside the ovary of the pistil. Gynoecium is called as the megasporophyll (megasporangium bearing leaf-like structure). Ovary is the bulging part at the bottom of the pistil, containing the locule. Placenta is located inside the locule and gives rise to megasporangia or ovules. The number of ovules in an ovary may be one (as in mango) to many (as in papaya).
Funicle attaches ovule to placenta. Body of ovule fuses with funicle at hilum, which thus acts as a junction between the two. Each ovule has one or two protective envelopes called integuments. Integuments encircle the ovule completely, except at a small opening called micropyle. Opposite to micropyle is the chalaza that represents the basal part of the ovule. Inside the integuments, a mass of cells called nucellus, is present which acts as an abundant reserve food material for the embryo sac or the female gametophyte. Embryo sac contains the egg, which is the female gamete; two synergids with a filiform apparatus to guide male gamete towards the egg cell; two polar nuclei in the central cell which fuse with second male gamete to form the primary endosperm nucleus; and three antipodal cells at the chalazal end.
