Question

Define exudation.

(a) Coming out of xylem sap from tips of leaves

(b) Loss of water from living aerial tissue in form of vapors

(c) Oozing out of liquid from pores and wounds

(d) Movement of substances through vascular bundles

This question was posed to me in an international level competition.

The query is from Phloem Transport topic in chapter Transport in Plants of Biology – Class 11

Answer 1

Right choice is (c) Oozing out of liquid from pores and wounds

To explain I would say: Exudation is the coming out of liquid substances from pores and wounds. Guttation is the coming out of xylem sap from tips of leaves. Transpiration is the loss of water from living aerial tissue in form of vapors. Movement of substances through vascular bundles is known as translocation.