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For grafting to "take", the the two plants' vasculatures have to be organized similarly. This is not possible for two such differently organized stems as a pepper and an apple. This is a cross section of a young woody stem (such as an apple, though this example is a tilia): This is a cross section of an herbaceous stem (such as a pepper): You can see ...


They are not individual cells. In fact, the "juice sacs" (as they are known) are actually specialized, multicellular hairs: Juice sacs originate as multicellular hairs in which the interior of the enlarged distal part breaks down and fills with liquid. The juice sacs constitute the fleshy, edible pulp of an orange and are the source of the sweet juice. ...

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