Question

layering is used to propagate plants that are ______.
a. easily cut apart
b. difficult to root or root naturally by layering
c. too thick to propagate by other methods
d. best grown from seed

Explanation:

Layering is a plant propagation method. Plants that are difficult to root through other methods (like cuttings) or that root naturally via layering are propagated using layering. Option a: Plants easily cut apart are often propagated by cuttings. Option c: Layering isn't for plants too thick for other methods (thickness isn't the main factor for layering). Option d: Plants best from seed don't need layering. So the correct answer is b.

Answer:

b. difficult to root or root naturally by layering