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 permits germination and pollen tube growth |
| D. |
the vegetative cells has not been damaged |
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