Modern, commercial strains of banana don’t have seeds. (Well, they do, but they’re tiny and sterile, unlike wild and often inedible varieties of bananas, which have large and viable seeds.) Seedless fruit-bearing plants (think of navel oranges) normally propagate only with human help—as in transplanting cuttings—because the plant has no natural way to regenerate when it dies. Here again, bananas break the mold. Each banana plant produces just one bunch of fruit over its lifetime of about a year and then dies—or at least appears to. But the stem above ground is just a portion of the plant, the so-called pseudostem. There is also an underground stem, called a rhizome, which produces new shoots at the base of the visible stem. These begin growing into new, flowering stems just as the old one is dying. The new plant, then, really isn’t new at all, and is genetically identical to its predecessor.



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