Which artificial propagation method is used for the production of jasmine plants ?

What is the name of asexual reproduction method in :

(l) Spirogyra, and (ii) Leishmania?

Name the artificial propagation method used for the propagation of

(a) rose plants, and

(b) apple trees.

Name the natural method by which strawberry plants are propagated.

Name two plants which are propagated by layering method.