[" 18.Pollen tube is made up of "],[[" 1) Sporopollenin "," 2) Lignosuberin "],[" 3) Pectolignine "," 4) Pectocellulose "]]

‘Pollen kitt’ is chiefly made up of :

‘Pollen kitt’ is chiefly made up of :

Exine of pollen grain is made up of

Exine of pollen grains is made up of

Pollen tube is composed of (A) pectin (B) cutin (C) sporopollenin (D) pecto-cellulose

Exine of pollen grain in made up of

Exine in pollen grain in made up of

Pollen tube is covered by a membrane made of

Pollen tube is covered by a membrane made of

Which of the following is not correct? (A) outer layer of pollen grain is made up of sporopollenin (B) Pollen grain of many species cause strong allergy (C) Pollen grain stored in liquid nitrogen can be used in crop breeding programme (D) Tapetum helps in dehiscence of anther