Most marijuana plants are easy to clone, others are not. In regards to 'other' plants if I remember correctly bananas pretty much now exist at the hand of man. They do not grow from seed but rather from new growth that protrude from the base. So while I'm not certain, but I think it would be difficult to 'take a cutting' from a banana and 'clone' it easily.
Among the other interesting tidbits learned was that banana trees are not even treestheyre the worlds largest perennial herbs. The distinction is not merely academic; the stems, which may appear to be solid trunks, are simply multiple layers of very large leaves that could be cut through with a regular knife. In fact, the stems often break under the weight of the bananas and need to be supported with poles.
Also surprising was that bananas grow upside down, seemingly showing contempt for gravity. Each plant has a flower shoot that produces a single bunch of bananasby bunch, I mean a set of about 15 subgroups called hands, for a grand total of about 200 banana fingers. On commercial banana plantations, each plants bunch is usually covered with a large plastic bag saturated with pesticides, to ward off both insects and birds.
Being Fruitful and Multiplying
Bananas also have an unusual life cycle. Normally, the primary reason for a plant to bear any sort of fruit in the first place is to propagate itself, since the fruit contains the seed. Modern, commercial strains of banana dont have seeds. (Well, they do, but theyre 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 helpas in transplanting cuttingsbecause 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 diesor 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 isnt new at all, and is genetically identical to its predecessor.