Lesson 4.2.3.2
4.2.3.2 Plant organ system Quiz: AQA Biology, Unit 2
20 questions
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Lesson 4.2.3.2, Plant organ system: 20 multiple choice questions for the AQA GCSE Biology (8461), Unit 2: Organisation, written with Revision Ninja.
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The 20 questions
-
Which plant organs form the main transport system?
- Roots, stem, leaves
- Fruit and stem
- Petals and roots
- Flowers and seeds
-
By which process do root hair cells absorb mineral ions?
- Transpiration
- Active transport
- Diffusion
- Osmosis
-
What is the movement of water through xylem to leaves called?
- Transpiration stream
- Active transport
- Translocation stream
- Osmotic pull
-
What process moves dissolved sugars through phloem tissue in plants?
- Osmosis
- Evaporation
- Translocation
- Transpiration
-
Which leaf structures control gas exchange and water vapour loss?
- Stomata
- Xylem vessels
- Phloem tubes
- Chloroplasts
-
Which environmental factor increases the rate of transpiration in plants?
- Higher temperature
- Lower light intensity
- Decreased air movement
- Higher humidity
-
How does high humidity affect the rate of plant transpiration?
- Stops transpiration
- Decreases the rate
- Increases the rate
- Has no effect
-
How does increased air movement affect the rate of transpiration?
- Increases the rate
- Stops transpiration
- Has no effect
- Decreases the rate
-
Why does increased light intensity increase the transpiration rate in leaves?
- Stomata open wider
- Water evaporates slower
- Stomata close completely
- Guard cells shrink
-
Which substance strengthens the hollow tubes of xylem tissue?
- Starch
- Lignin
- Cellulose
- Keratin
-
Phloem tissue is composed of elongated cells with which feature?
- Impermeable membranes
- Dead hollow centres
- Lignin in walls
- Pores in end-walls
-
Which piece of apparatus is used to estimate transpiration rate?
- Photometer
- Potometer
- Clinometer
- Potentiometer
-
Which unit measure is used to state transpiration rate?
- Force per area
- Volume per time
- Mass per area
- Distance per second
-
What do root hair cells absorb from the surrounding soil?
- Water and minerals
- Starch and proteins
- Glucose and oxygen
- Carbon dioxide
-
What is the main function of lignin in xylem vessels?
- Storing excess glucose
- Absorbing light energy
- Providing structural support
- Facilitating active transport
-
How does an increase in temperature affect the rate of transpiration in plants?
- Has no effect
- Decreases it
- Stops it completely
- Increases it
-
What effect do dry and windy conditions have on the rate of transpiration?
- Increases it
- Has no effect
- Decreases it
- Stops it completely
-
Which factor reduces transpiration by lowering the rate of evaporation from the leaf?
- High humidity
- Bright light
- Strong wind
- High temperature
-
Which plant structures do guard cells control to regulate gas exchange and water loss?
- Root hairs
- Phloem tubes
- Xylem vessels
- Stomata
-
Why do plants close their stomata during hot and dry conditions?
- Increase oxygen uptake
- Absorb mineral ions
- Reduce water loss
- Stop photosynthesis
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