Pollen Germination & Tube Formation — NEET Biology

Which of the following statements are NOT correct? S1: The vegetative cell in a mature pollen grain is smaller than the generative cell and contains a large, irregularly shaped nucleus. S2: In over 60% of angiosperms, pollen grains are shed at a 2-celled stage, where the generative cell divides to form two male gametes during the growth of pollen tube in the stigma. S3: The generative cell possesses abundant food reserves and is primarily responsible for forming the pollen tube upon germination. S4: The inner wall of the pollen grain, called the intine, is made of sporopollenin and extends through the germ pores to form the pollen tube. S5: In plants which shed pollen in the 3-celled condition, the pollen tubes carry the two male gametes from the beginning. S6: The primary function of the vegetative cell is to provide nourishment to the generative cell and support the growth of the pollen tube.