2.1 STRUCTURE OF A LEAF

The leaf has a shiny, waxy cuticle around it to

• increase the rate of photosynthesis
• attract more light
• control water loss
• stop carbon dioxide and oxygen gases escaping

Most of the chloroplast cells are found in the

• upper epidermis
• pallisade mesophyll layer
• lower epidermis
• stomata

The water needed for photosynthesis comes into the leaves through the

• upper epidermis
• stomata
• guard cells
• xylem cells

The important gases, carbon dioxide and oxygen, enter and leave the leaf through the

• upper epidermis
• phloem
• stomata
• guard cells

The role of the guard cell is to

• help control the temperature of the plant
• control how much water enters the leaf
• control how much glucose is stored
• control the movement of water vapour & gases 

Sugar and the products of photosynthesis move through the plant in 

• the phloem cells
• the xylem cells
• the root hair cells
• palisade mesophyll layer

thin stalk that connects the blade of the leaf to the plant's stem

• blade

• cuticle

• petiole

• epidermis

Specialized cells that trap light on top of the leaf are called __________ __________ cells

• stem

• root

• stomata

• palisade mesophyll

What is the name of the elongated, packed cells (part G) directly under the upper epidermis?

• Palisade cells

• Guard cell

• Spongy layer

• Lower epidermis

So from top to bottom, a leaf's structure is

• 1. Palisade cells
  2. Waxy cuticle and epidermis cells
  3. Spongy mesophyll
  4. Epidermis and cuticle, with stomata
• 1. Waxy cuticle and epidermis cells
  2. Palisade cells
  3. Spongy mesophyll
  4. Epidermis and cuticle, with stomata
• 1. Epidermis and cuticle, with stomata
  2. Waxy cuticle and epidermis cells
  3. Palisade cells
  4. Spongy mesophyll
• 1. Waxy cuticle and epidermis cells
  2. Spongy mesophyll
  3. Palisade cells
  4. Epidermis and cuticle, with stomata