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 damaged
Correct Answer: D
Solution :
Red light laser in the spectral range of 660 ? 680 nm which are considered as the strong absorption bonds of chloroplasts and chromo plasts. These light induces the growth in vegetative cell.
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