Outer wall of pollen grain is formed of
A. Cellulose
B. Pectocellulose
C. Lignin
D. Sporopollenin
Answer: Option D
Solution(By Examveda Team)
Outer wall of pollen grain is formed of Sporopollenin.Pollen grains have a hard coat made of sporopollenin that protects the gametophytes during the process of their movement from the stamens to the pistil of flowering plants, or from the male cone to the female cone of gymnosperms.
Each pollen grain contains vegetative cells and a generative (reproductive) cell. In flowering plants the vegetative tube cell produces the pollen tube, and the generative cell divides to form the two sperm nuclei.
Related Questions on Plant Pathology
Which photosynthetic bacteria possess both PS I and PS II?
A. Purple sulphur bacteria
B. Cyanobacteria
C. Purple nonsulphur bacteria
D. Green sulphur bacteria
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