In which of the following sets of families, the pollen grains are viable for months?
Transfer of pollen grains from another to stigma of another flower of same plant is known as :
In angiosperms the correct sequence of events in formation of female gametophyte in the ovule is :
(A) 3 successive free nuclear divisions functional megaspore.
(B) Degeneration of 3 megaspores.
(C) Meiotic division in megaspore mother cell.
(D) Migration of 3 nuclei towards each pole.
(E) Formation of wall resulting in seven celled embryosac.
Choose the correct answer from the options given below :
What is the function of tassels in the corn cob?