Where does photosynthesis occur in a rose bush?
A In the leaves
B In the roots
C In the flowers
D In the seeds
Plants often turn some of the food they make into another substance for storage. The name of this substance is:
A glucose
B starch
C fibre
D pasta
Which of these shows the correct word equation for photosynthesis?
A glucose + carbon dioxide → water + oxygen (+ energy)
B glucose (+ energy) → oxygen + glycerol
C water + carbon dioxide → glucose + oxygen
D chlorophyll + carbon dioxide → water + glycogen
Aerobic respiration is a process which:
A stores chemical energy in food.
B makes food for plants living under water.
C does not happen in plants but only in humans when they exercise hard.
D releases energy from food.
Leaves are often wide (broad) so that they can:
A absorb as much sunlight as possible.
B catch as much rain as possible
C provide shelter for animals living under them.
D float to the ground when they drop in autumn.
Gases get into and out of a leaf by:
A diffusion
B absorption
C conduction
D convection
Look at this list of substances: glucose, fat, cellulose, protein. Which of these substances can plants make?
A glucose and cellulose only
B glucose, cellulose and fat only
C glucose, cellulose and protein only
D all of them
Plants need cellulose to:
A store energy.
B repair damaged cells.
C make cell walls.
D make cell surface membranes.
The picture shows a cell from a root. What is it called?
A xylem cell
B root cortex cell
C root hair cell
D root palisade cell
If plants do not get enough water they start to:
A shrink.
B grow towards the light.
C grow bigger roots.
D wilt.
One important type of mineral salt for plants is:
A nitrate
B sodium chloride
C loam
D clay
Water is carried up a plant in xylem tubes. What else do xylem tubes carry?
B fibre
C mineral salts
D pollen
The atmosphere is about:
A 81% oxygen and 21% nitrogen.
B 78% nitrogen and 21% oxygen.
C 81% carbon dioxide and 21% oxygen.
D 78% carbon dioxide and 21% oxygen
Look at these chemical processes. photosynthesis respiration burning fuels Which of these processes add carbon dioxide to the air?
A respiration and burning
B respiration only
C photosynthesis and respiration
D burning only
Plants are important in keeping the atmosphere in balance because:
A they use up oxygen.
B they use up carbon dioxide.
C they provide food for animals and humans.
D they use water.
Which of these would NOT be a disadvantage of cutting down forests?
A Logging companies could make more profits.
B There would be fewer trees to keep the atmosphere in balance.
C Some species might become extinct.
D Floods might wash away the soil.
A In all the parts
B In leaves and flowers only
C In the leaves only.
D In the stem only.
A glucose.
B starch.
C fibre.
D pasta.
Leaves are often wide so that they can:
B catch as much rain as possible.
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