Understanding Leaf Structure and Function

What is the main function of leaves in terrestrial plants?

• To store water

• To conduct photosynthesis and gas exchange

• To absorb nutrients from the soil

• To provide structural support

What is the name of the layer that covers both the upper and lower surfaces of a leaf?

• Stomata

• Mesophyll

• Epidermis

• Chloroplast

What is the purpose of the cuticle on a leaf?

• To aid in photosynthesis

• To reduce water loss

• To facilitate gas exchange

• To store nutrients

Which layer of the leaf contains tightly packed cylinder-shaped cells?

• Spongy mesophyll

• Palisade mesophyll

• Lower epidermis

• Cuticle

Where does photosynthesis primarily take place in the leaf?

• Stomata

• Spongy mesophyll

• Palisade mesophyll

• Cuticle

What is the characteristic feature of the spongy mesophyll?

• Tightly packed cells

• Many air spaces

• Thick cuticle

• High number of chloroplasts

Which part of the leaf contains pores called stomata for gas exchange?

• Upper epidermis

• Palisade mesophyll

• Lower epidermis

• Spongy mesophyll

What gases are exchanged through the stomata?

• Oxygen and nitrogen

• Carbon dioxide and oxygen

• Hydrogen and oxygen

• Carbon dioxide and nitrogen

Which layer of the leaf has the most chloroplasts (for photosynthesis)?

• palisade mesophyll

• spongy mesophyll

• upper epidermis

• lower epidermis