Which of the following statements is correct?

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(D) $1$. The hard outer layer of a pollen grain is called the exine,not the intine. The intine is the inner,thin layer.$2$. Sporogenous tissue consist

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The tapetum provides nourishment to the developing pollen grains.

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(D) $1$. The hard outer layer of a pollen grain is called the exine,not the intine. The intine is the inner,thin layer.$2$. Sporogenous tissue consists of diploid $(2n)$ cells that undergo meiosis to form microspores.$3$. The endothecium is the layer that aids in the dehiscence of anthers to release pollen,not the production of microspores.$4$. The tapetum is the innermost wall layer of the microsporangium,which provides nourishment to the developing microspores (pollen grains). Thus,statement $D$ is correct.

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