biology chapter 2 : leaf structure and function

Front

What are stomata?

Back

Stomata are small openings on the surface of leaves that allow for gas exchange (CO2 in, O2 out) and transpiration (water vapor loss).

Front

What is the function of the cuticle in leaves?

Back

The cuticle is a waxy layer that covers the leaf surface, helping to reduce water loss and protect against pathogens.

Front

What is the role of the palisade mesophyll?

Back

The palisade mesophyll is a layer of tightly packed cells in the leaf that contains chloroplasts and is primarily responsible for photosynthesis.

Front

What is the spongy mesophyll?

Back

The spongy mesophyll is a layer of loosely arranged cells in the leaf that facilitates gas exchange and contains air spaces for CO2 diffusion.

Front

What is transpiration?

Back

Transpiration is the process by which water vapor is lost from the plant to the atmosphere through stomata.

Front

How does light intensity affect the rate of transpiration?

Back

Increased light intensity typically increases the rate of transpiration as it stimulates stomatal opening for photosynthesis.

Front

What is the significance of guard cells?

Back

Guard cells surround stomata and regulate their opening and closing, controlling gas exchange and water loss.

Front

What factors affect the rate of transpiration?

Back

Factors include temperature, humidity, wind speed, and light intensity.

Front

What happens to a plant without stomata?

Back

Without stomata, a plant cannot effectively exchange gases, leading to potential overheating and death.

Front

What is the lamina of a leaf?

Back

The lamina is the broad, flat part of the leaf that is primarily involved in photosynthesis.