Biology Form 5 Chapter 2 Leaf Structure & Function

The external structure of a green leaf consists of ___________?

• palisade mesophyll and spongy mesophyll

• lamina and petiole

• cuticle and epidermis

• stoma and guard cell

Which characteristic of the leaf to allow easy diffusion of photosynthetic gases?

• Flat

• Thin

• Smooth

• green

Which of the following external features allow a leaf to absorb maximum energy from sunlight?

• Thin lamina

• Wide flat surface

• Abundant network of vessels all over a leaf

• Abundant stomata at the bottom side of a leaf

Describe the leaf arrangement.

WAXY

WATERPROOF

TRANSPARENT

Which part of the leaf have the properties above?

• Cuticle

• Upper epidermis

• Palisade mesophyll

Which of the following is NOT the characteristic of upper epidermis?

• Transparent

• Contain chloroplast

• Located under the cuticle area

The figure shows the structure of a leaf. Which part are able to undergo photosynthesis?
*more than one answer

• P

• Q

• R

• S

The figure shows the structure of a leaf. Which labelled part undergoes highest rate of photosynthesis?

• P

• Q

• R

• S

S has characteristics such as irregular shape and loosely arrange from one another.
What is the reason of the characteristic?

• to ease CO₂ and water absorption to palisade mesophyll cell for photosynthesis

• to absorb maximum sunlight

• to transport water and mineral salt

The area with RED and ORANGE coloration are known as...

• mesophyll tissue

• epidermal tissue

• vascular bundle