Methods of Estimating and Environmental Factors Affecting Transpiration in Plants

The video tutorial explains methods to estimate the rate of transpiration in plants, including measuring water uptake and mass loss. It also discusses how environmental factors like temperature, humidity, air movement, and light intensity affect transpiration rates.

What is the primary assumption made when estimating the rate of transpiration by measuring water uptake?

• Water uptake is unrelated to water loss.

• Water uptake is directly related to water loss.

• Water uptake is equal to water loss.

• Water uptake is inversely related to water loss.

In the first experiment, how is the rate of transpiration determined?

• By measuring the movement of an air bubble.

• By observing the color change in leaves.

• By measuring the mass of the plant.

• By counting the number of leaves.

How does temperature affect the rate of transpiration?

• Higher temperatures have no effect on transpiration.

• Higher temperatures decrease transpiration.

• Higher temperatures stop transpiration.

• Higher temperatures increase transpiration.

What effect does high humidity have on transpiration?

• It has no effect on transpiration.

• It decreases the rate of transpiration.

• It increases the rate of transpiration.

• It stops transpiration completely.

Why does increased air movement enhance the rate of transpiration?

• It reduces the energy of water molecules.

• It blows away water molecules, maintaining a low concentration of water vapor outside the leaf.

• It increases the concentration of water vapor inside the leaf.

• It decreases the concentration gradient between the inside and outside of the leaf.