Name the structure/part of the leaves that allows gaseous exchange.
Stomata
Describe and explain what happens when a ring of bark is removed from the stem as shown in the diagram.
The part above the cut region swells up. Food made by the leaves cannot be transported down as the food carrying tubes are removed.
Name the tubes that carry water and mineral salts.
Water-carrying tubes or Xylem
Jane soaked a stem in water with red dye. She then cut the stem and examine the cross section of the stem. Name the part which will turn red.
A; water-carrying tubes
Water is lost as ____________ _________ through the ________________ of the leaves.
water vapour; stomata
Which part of the stem, A, B, C or D shown in the diagram, transports water and mineral salts? Name the part.
A; Water-carrying tubes
Name the structure of the plant that makes food. What does it contain to help trap light to make food?
Leaves; Chlorophyll
Using the numbers given, trace the pathway of water in the plant.
2,3,4,5,6,7
Which part of the stem, A, B, C or D shown in the diagram, transports manufactured food? Name the part.
C, Food-carrying tubes
Bambie set up the experiment as shown in the diagram in different conditions. Under which conditions did the time taken for the air bubble to move 50mm shortest? Explain why.
Under these conditions the rate of evaporation is the fastest. Most amount of water evaporates to form most water vapour in leaves and escapes through stomata
What happens to excess food made by the plant?
Converted to starch or sucrose and stored in different parts of plants
Describe what happens to the set-up shown and explain why
Regions above & below the cut swells. Food made by the leaves above & below the cut cannot be transported across the cut part as food carrying tubes are removed
A plant was wrapped in plastic bag as shown in the picture and left in the sun for 12 hours. Describe and explain what happens.
Water droplets are seen on the inside of the plastic bag. Water vapour escapes the stomata of the leaves. The warmer water vapour then condenses on the plastic.
Lia took 4 leaves & weighed them before the experiment. She then set up the experiment as shown. After 24 hours, she weighed them again. Explain why C weighs less than B at the end of experiment.
Lower surface of C is not covered with vaseline so more water vapour is lost as there are more stomata on the lower surface of the leaves than upper surface.
Lia took 4 leaves & weighed them before the experiment. She then set up the experiment as shown. After 24 hours, she weighed them again. Rank the leaves according to the amount of weight loss starting from the least to the most.
A, B, C, D
Describe the direction of the movement of food in the plant.
leaves to stems to roots
Renaldo set up the experiment as shown in the diagram. Which direction will the air bubble in the glass tube move? Explain
Towards the plant. As the plant loses water vapour through the stomata of the leaves, the plant will absorb more water in the glass tube and beaker.
Describe two functions of the roots.
Absorb water and mineral salts; anchor the plant firmly to the ground.
A ring of bark is removed as shown in the diagram. What will happen to the fruits? Explain
The fruits become bigger. Food carrying tubes are removed, food made by the leaves cannot be transported down the cut region. Excess food are stored in fruits
Name the tubes that carry manufactured food from the leaves.
Food-carrying tubes or Phloem
Describe the direction of the movement of water in the plant.
Root to stem to leaves
Using the numbers given, trace the pathway of manufactured food in the plant.
7,6,5,4,3,2
Name the substances transported by the water-carrying tubes.
Water and mineral salts
Name the substance transported by the food-carrying tubes.
Manufactured food
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