Question

If the phloem of a twig is removed keeping the xylem intact , the leaves of a twig wilt .

Answer 1

If the phloem of a twig is removed, then the food will not be translocated to different parts of the plant. The roots will die first in such a plant. This is because the roots cannot synthesise their own food and they depend on food synthesised by leaves. When the roots die, the plant will not be able to absorb water resulting in wilting of leaves............

Answer 2

If you remove the phloem from the twig, then the food will not be able to get translocated  to different parts of the plant. In such a plant, the roots will die first. This is because the roots cannot synthesis  their own food; thus, if the supply of food is cut down to the root, they will die. When the roots will die, the plant would not absorb water as a result the plant will wilt its leaves.