What apparatus is used to calculate the rate of transpiration?BarometerDynamometerPotometerThermometerSpeedometer

Break Down the Problem

1. Identify the purpose of each apparatus listed.
2. Determine which apparatus is specifically used for measuring transpiration rates in plants.

Relevant Concepts

• Transpiration: The process by which water vapor is lost from plant surfaces, especially through small openings called stomata.
• Potometer: A device commonly used to measure the rate of transpiration by observing the amount of water absorbed by the plant from the potometer over a certain period.

Analysis and Detail

1. Barometer: Measures atmospheric pressure, not transpiration.
2. Dynamometer: Measures force or power, unrelated to water movement in plants.
3. Potometer: Specifically designed to calculate the rate of water uptake, which correlates with transpiration rates.
4. Thermometer: Measures temperature, not directly related to transpiration measurement.
5. Speedometer: Measures speed, irrelevant to plant physiology.

Verify and Summarize

After analyzing each apparatus, it is clear that the potometer is the only device that measures the rate of transpiration in plants.

Final Answer

The apparatus used to calculate the rate of transpiration is the Potometer.