Adaptations of the Leaf

Which part of the leaf is responsible for photosynthesis?

• Stomata

• Palisade cells

• Xylem

• Guard cells

Which of the following is NOT part of the leaf's structure?

• Stomata

• Epidermis

• Chloroplast

• Phloem

Why is the surface area of a leaf large?

• To increase the amount of light that the leaf absorbs

• To decrease the amount of water lost through evaporation

• To make the leaf stronger

• To reduce the number of stomata needed for gas exchange

What is the primary function of the stomata?

• To absorb light energy for photosynthesis

• To transport water to the leaf

• To allow gas exchange (CO₂ in, O₂ out)

• To store glucose produced during photosynthesis

What role does the waxy cuticle play in the leaf?

• It helps absorb light for photosynthesis.

• It allows the leaf to float on water.

• It prevents water loss by evaporation.

• It helps transport glucose throughout the plant.

How do palisade cells contribute to photosynthesis?

• They store glucose produced during photosynthesis.

• They contain chloroplasts, where photosynthesis occurs.

• They transport water from the roots to the leaf.

• They open and close the stomata to regulate gas exchange.

Why do guard cells control the opening and closing of the stomata?

• To regulate the amount of light absorbed by the leaf

• To prevent water loss by controlling transpiration

• To control the flow of water through the xylem

• To store glucose during photosynthesis

What is the function of the spongy mesophyll layer in the leaf?

• It stores glucose produced during photosynthesis.

• It contains chloroplasts and carries out photosynthesis.

• It facilitates gas exchange by creating air spaces.

• It provides structure and support for the leaf.

How does the leaf structure help with gas exchange?

• The thick waxy cuticle prevents gas exchange.

• The leaf has a thin structure to allow gases to pass through easily.

• The large surface area and stomata allow gases like CO₂ to enter and O₂ to leave.

• The palisade cells store gases until needed.

Why is the arrangement of mesophyll cells important for photosynthesis?

• Palisade cells are arranged loosely to allow for maximum light absorption.

• The spongy mesophyll cells are arranged tightly to store glucose.

• The mesophyll cells are arranged loosely, creating air spaces for gas exchange.

• The mesophyll cells contain large vacuoles to store sunlight.