Which one of the following statements is not true?
Pollen grains of many species cause severe allergies.
Stored pollen in liquid nitrogen can be used in the crop breeding programmes.
Tapetum helps in the dehiscence of anther.
Exine of pollen grains is made up of sporopollenin.
Identify $A$ to $D$ in the following diagram
...... posses dense cytoplasm and generally have more than one nucleus
Microsporangia develops in to
In flowering plants meiosis occurs at the time of
Pollen tablets are available in the market for