Question

all cut areas that are left exposed in the grafting process should be covered with waterproof material to ______.
a. prevent bleeding of sap
b. prevent insects from entering the graft
c. prevent drying of the cambium
d. make the graft look better

Explanation:

In grafting, the cambium layer is crucial for the union of the graft. Exposed cut areas can dry out, harming the cambium. Covering with waterproof material prevents this drying. Option a: Sap bleeding prevention isn't the main reason for waterproof covering. Option b: Insect prevention is secondary; the primary is cambium moisture. Option d: Aesthetic is not the purpose. So the correct reason is to prevent drying of the cambium.

Answer:

c. prevent drying of the cambium