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(A) In a mature pollen grain,there are two types of cells: the vegetative cell and the generative cell.$1$. The vegetative cell is larger,has abundant

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Vegetative cell

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(A) In a mature pollen grain,there are two types of cells: the vegetative cell and the generative cell.$1$. The vegetative cell is larger,has abundant food reserves,and a large irregularly shaped nucleus.$2$. The primary function of the vegetative cell is to produce the pollen tube upon germination on the stigma.$3$. The generative cell is small and floats in the cytoplasm of the vegetative cell,eventually dividing to form two male gametes.Therefore,the vegetative cell is responsible for the formation of the pollen tube.

Which of the following is associated with the formation of the pollen tube?

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