Question

Potometer and clinostat are used to study

• A. Photosynthesis and respiration
• B. Transpiration and growth
• C. Phototropism and geotropism
• D. Transpiration and geotropism

Answer 1

The correct option is D Transpiration and geotropism

Potometerare simple instruments based on the principle that water absorption is equal to the water lost through transpiration. It is used to measures the rate of transpiration by measuring the rate of movement of the air bubble in a sealed glass tube completely filled with water, at one end of which is placed a plant that loses water due to transpiration. A clinostat is a device, which uses rotation to measure the effects of gravitational pull on plant growth (gravitropism or geotropism) and development (gravimorphism).