Question

Even after killing the generative cell with a laser beam, the pollen grain of a flowering plant germinates and produces normal pollen tube because _______________________________.

• A. Laser beam stimulates pollen germination and pollen tube growth
• B. The laser beam does not damage the region from which pollen tube emerges
• C. The contents of killed generative cell permit germination and pollen tube growth
• D. The vegetative cell has not been damages

Answer 1

The correct option is D The vegetative cell has not been damages

During microspore development, cellular differentiation arises. Then Generative and vegetative cells are formed. The generative cell produces two sperm cells. While the vegetative cell produces the pollen tube. That helps to deliver the male gametes to the embryo sac. However if a laser beam kills the generative cell, it will be ineffective on the normal pollen tube formation.

Thus, the correct answer is option D.