Year: 2016
Topic: Sexual Reproduction in Flowering Plants
Time :
1.
Which one of the following statements is not true ?
(1). Exine of pollen grains is made up of sporopollenin
(2). Pollen grains of many species cause severe allergies
(3). Stored pollen in liquid nitrogen can be used in the crop breeding programmes
(4). Tapetum helps in the dehiscence of anther