12081103
Descripción
Test por Jeffrey Piggott, actualizado hace más de 1 año
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Creado por Jeffrey Piggott
hace casi 7 años
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Pregunta 1
Pregunta
where is this cell is found in a flowering plant?
Respuesta
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In the male part of a flower.
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In the roots of the plant.
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On the surface of a leaf.
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In side a leaf.
Pregunta 2
Pregunta
Which TWO structures are found in plant cells but not in animal cells.
Respuesta
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Vacuole and cell membrane
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Chloroplasts and cell membrane
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Chloroplasts and cell wall
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Cell membrane and large vacuole.
Pregunta 3
Respuesta
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A in all the parts
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B in parts R and S only
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C in part R only
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D in part Q only
Pregunta 4
Pregunta
Plants often turn some of the food they make into another substance for storage. The name of this substance is:
Respuesta
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A glucose.
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B starch.
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C fibre.
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D pasta.
Pregunta 5
Pregunta
Which of these shows the correct word equation for photosynthesis?
Respuesta
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glucose + carbon dioxide → water + oxygen (+ energy)
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glucose (+ energy) → oxygen + glycerol
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water + carbon dioxide → glucose + oxygen
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chlorophyll + carbon dioxide → water + glycogen
Pregunta 6
Pregunta
Leaves are often wide so that they can:
Respuesta
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A absorb as much sunlight as possible.
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B catch as much rain as possible.
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C provide shelter for animals living under them.
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D float to the ground when they drop in autumn.
Pregunta 7
Pregunta
Gases get into and out of a leaf by:
Respuesta
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diffusion.
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absorption.
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conduction.
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convection.
Pregunta 8
Pregunta
Look at this list of substances.
glucose, fat, cellulose, protein
Which of these substances can plants make?
Respuesta
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glucose and cellulose only
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glucose, cellulose and fat
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glucose, cellulose and protein
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all of them
Pregunta 9
Pregunta
Plants need cellulose to:
Respuesta
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A store energy.
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B repair damaged cells.
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C make cell walls.
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D make cell surface membranes.
Pregunta 10
Pregunta
If plants do not get enough water they start to:
Respuesta
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A shrink.
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B grow towards the light.
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C grow bigger roots.
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D wilt.
Pregunta 11
Pregunta
One important type of mineral salt for plants is:
Respuesta
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A sodium chloride
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B nitrates
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C clay
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D loam
Pregunta 12
Pregunta
Water is carried up a plant in xylem tubes. What else do xylem tubes carry?
Respuesta
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A glucose
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B fibre
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C mineral salts
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D pollen
Pregunta 13
Pregunta
The atmosphere is about:
Respuesta
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A 78% oxygen and 21% nitrogen.
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B 78% nitrogen and 21% oxygen.
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C 8% carbon dioxide and 21% oxygen.
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D 78% oxygen and 21% carbon dioxide.
Pregunta 14
Pregunta
Look at these chemical processes.
photosynthesis, respiration, burning fuels.
Which of these processes add carbon dioxide to the air?
Respuesta
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A respiration and burning
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B respiration only
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C photosynthesis and respiration
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D burning only
Pregunta 15
Pregunta
Plants are important in keeping the atmosphere in balance because:
Respuesta
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A they use up oxygen.
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B they use up carbon dioxide.
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C they provide food for animals and humans.
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D they use water.
Pregunta 16
Pregunta
Which of these would not be a disadvantage of cutting down forests?
Respuesta
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A Logging companies could make more profits.
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B There would be fewer trees to keep the atmosphere in balance.
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C Some species might become extinct.
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D Floods might wash away the soil.
Pregunta 17
Pregunta
The roots have a number of functions.
Tick TWO functions of roots.
Respuesta
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Absorb carbon dioxide from the air.
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Absorb water and mineral salts from the soil.
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Absorb glucose from soil.
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Hold the plant in the soil.
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