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Q.
Male cone of Pinus possesses
NTA AbhyasNTA Abhyas 2020
Solution:
Pinus belongs to the subdivision Gymnospermeae which is a huge, tall, perennial tree. The wood is without vessels.
The male cone of the pine plant is an aggregate of the microsporophylls. This is slightly oblong with many parallel microsporangia on the lower surface.
The diploid microspore mother cell undergoes meiosis to form haploid pollen grain or the microspore.
At maturity, the pollen grain is released in the air, with the help of air. During the time of dehiscence, the pollen grain has four cells. These four cells are two nonfunctional prothallial cells, a central vegetative cell, and a generative cell.
A megasporophylls are clustered, which represents the female cone in pine plant.