photosynthesis

The water needed for photosynthesis comes into the leaves through the

• waxy layer

• stomata

• guard cells

• xylem cells

Which structures open and close stomata to allow gas exchange but prevent water loss in leaves?

• Chloroplasts

• Waxy layer

• Guard cells

• Palisade layer

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

• waxy layer

• palisade layer

• spongy layer

• stomata

The reactants needed for photosynthesis to occur are:

• carbon dioxide & water
• carbon dioxide & oxygen
• oxygen & water
• carbon dioxide, oxygen & water

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

• Palisade layer

  Waxy layer

  Spongy layer

  Stomata

• Waxy cuticle

  Palisade layer

  Spongy layer

  Stomata

• Stomata

  Waxy cuticle

  Palisade layer

  Spongy layer

• Waxy layer

  Spongy layer

  Palisade layer

  Stomata

What is the name of the pigment that makes leaves green?

• Chloroplasts

• Chlorophyll

• Waxy layer

• Stomata

What is A?

• stomata

• waxy cuticle

• palisade mesophyll

• upper epidermis

What is B?

• stomata

• waxy cuticle

• palisade mesophyll

• upper epidermis

What is C?

• stomata

• waxy cuticle

• palisade mesophyll

• upper epidermis