3.Why do grafting and budding considered the most important means of plant propagation? a. grafting and budding can be done in less than a minute b.grafting and budding can be done without water c.grafting and budding are the easiest ways to use d.grafting and budding can propagate plants that can't be propagated by air layering
4.which of the following elements in planting trees focuses on the biological function of the trees
a.appropriate temperature
b.enough sunlight
c.enough space
d.minerals form the ground​