Plant structures and transport

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 reactants needed for photosynthesis to occur are:

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

Plants need to take in oxygen gas for respiration

• only at night 
• only during the day
• both during the day & the night

Transpiration helps the plant

• make more sugars at night
• move water from the roots to the stem and leaves
• move sugars from the leaf to be stored in the stem & roots
• make more chloroplasts

Sugar and the products of photosynthesis move through the plant in 

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

What gas does the process of photosynthesis release into the atmosphere?

• oxygen
• carbon dioxide
• water
• nitrogen

Which of the following equations represents the overall chemical reaction for photosynthesis?

• 6O₂+ 6H₂O → C₆H₁₂O₆+ 6O₂

• C₆H₁₂O₆ + 6H₂O→ 6O₂+ 6O₂

• 6CO₂+ 6H₂O→ C₆H₁₂O₆+ 6O₂

• 6O₂ + 6H₂O→ C₆H₁₂O₆ + 6CO₂