Quiz on the External Structure of a Leaf

What is the function of the lamina in a leaf?

• To produce flowers

• To support the stem

• To provide a wide surface for sunlight exposure

• To store water

What is the purpose of the petiole in a leaf?

• To produce oxygen

• To connect the lamina to the stem

• To store nutrients

• To attract insects

Why is the lamina flat-shaped?

• To allow gases to diffuse efficiently

• To provide a narrow surface for sunlight exposure

• To absorb more water

• To create a rough texture

What does the petiole connect in a leaf?

• The stem to the branches

• The lamina to the stem

• The lamina to the flowers

• The stem to the roots

What does the petiole stretch out into the lamina to produce?

• A layer of thorns

• A protective coating

• A layer of wax

• A network of middle veins

What is the main function of the stomata in a leaf?

• To regulate water flow

• To produce flowers

• To store nutrients

• To attract sunlight

Why are chloroplasts important in the process of photosynthesis?

• To provide color to the leaf

• To store water

• To absorb carbon dioxide

• To capture sunlight and convert it into energy

What is the function of cuticle layer?

• to prevent loses of gases

• to absorb maximum sunlight

• to reduces loss of water

• to carry out photosynthesis

Which of the following cells able to carry out photosynthesis?

• guard cell

• upper epidermis cell

• lower epidermis cell

Irregular shape

loosely arranged

the statements refer to......

• xylem tissue

• palisade mesophyll cell

• spongy mesophyll cell

• phloem tissue