Which one of the following statements is wrong?
When pollen is shed at twocelled stage, double fertilization does not take place.
Vegetative cell is larger than generative cell.
Pollen grains in some plants remain viable for months.
Intine is made up of cellulose and pectin.
Meiosis can be observed in
$A$ : Formation of mature male gametophyte requires one meiotic and one mitotic division in $60\;\% $ of the
angiosperms.
$R$ : Pollination occurs in three celled condition in majority of angiosperms.
If root of flowering plant has $24$ chromosomes then its gamete has how many chromosomes?
Which part of the reproductive structure produces both enzymes and hormones