Comparative study of rates of rates of transpiration in the upper and lower surfaces of leaf, using four-leaf experiment
Practical Notebook Biology Standard XII Biology Answeres Practical Notebook Standard XII Class-12th science Click here download in PDF B. DEMONSTRATION EXPERIMENTS 1. Comparative study of rates of transpiration in the upper and lower surfaces of the leaf, using four-leaf experiment. 7 Loss of excess water in the form of vapor through the aerial parts of the plant is called transpiration. Aim: To study the comparative rate of transpiration in the upper and lower surfaces of a leaf by conducting four-leaf experiments. Requirements: - Two stands, thread, four leaves of Calotropis / banyan tree, Vaseline (petroleum jelly), etc. Fig. Comparison of transpiration, a demonstration by four-leaf experiment Apply Vaseline to leaf surface in the following manner, 1. Leaf A: - Petroleum jelly is applied on both surfaces Figure: Procedure: The leaves selected should be healthy preferably of the same size and showing growth....
