PLANTS
PLANT REPRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A tube that grows from a pollen grain to an ovule.
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Pollen tube
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Filament
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Anther
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Pollination
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Explanation:
Detailed explanation-1: -Final answer: Growth of pollen tube towards ovule is called Phototropism.
Detailed explanation-2: -After a pollen grain lands on a receptive stigma of a pistil, a pollen tube germinates from the hydrated pollen grain and delivers the immotile sperm cells over a long distance toward the ovule. A pollen tube is a tip-growing cell that grows surprisingly fast.
Detailed explanation-3: -The pollen tube (PT) is a unique and specialized structure in plants. Its sole purpose is to deliver sperm cells to the female gametophyte for double fertilization.
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