Lesson T1.4.4
T1.4.4 Leaf stomata and gas exchange in plants Quiz: KS3 Biology, Unit 1
20 questions
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Lesson T1.4.4, Leaf stomata and gas exchange in plants: 20 multiple choice questions for the KS3 Biology (National Curriculum), Unit 1: Structure and function of living organisms, written with Revision Ninja.
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The 20 questions
-
What are the microscopic pores on plant leaves called?
- Guard cells
- Chloroplasts
- Cuticles
- Stomata
-
Which cells surround each leaf stoma and control its opening?
- Palisade cells
- Guard cells
- Root hair cells
- Xylem cells
-
What is the main function of plant stomata?
- Food production
- Gas exchange
- Water absorption
- Light trapping
-
Which gas is released from leaves through stomata during photosynthesis?
- Oxygen
- Methane
- Carbon dioxide
- Nitrogen
-
What is the loss of water vapour from leaves called?
- Respiration
- Translocation
- Photosynthesis
- Transpiration
-
Why do plant stomata typically close during the night?
- Absorb more oxygen
- Increase gas exchange
- Reduce water loss
- Speed up transpiration
-
On which part of a leaf are most stomata found?
- Waxy cuticle
- Leaf edge
- Lower surface
- Upper surface
-
Why do plant leaves typically have a broad, flat surface area?
- To prevent insect attack
- To store extra glucose
- To shed heavy rainfall
- To absorb more light
-
What happens to stomata in a dry and windy environment?
- They close
- They widen
- They dissolve
- They multiply
-
Through which structure does water vapour escape a leaf?
- Stomata
- Palisade layer
- Xylem vessels
- Waxy cuticle
-
Which gas enters leaves through stomata during the day?
- Carbon dioxide
- Hydrogen gas
- Water vapour
- Nitrogen gas
-
What causes guard cells to bow apart and open a stoma?
- Losing all water
- Growing thick walls
- Freezing solid
- Taking in water
-
What happens when a leaf's lower surface is coated in petroleum jelly?
- More light absorbed
- Increased transpiration
- Faster photosynthesis
- Less water lost
-
Which term describes the diffusion of gases in and out of a leaf?
- Ventilation
- Digestion
- Excretion
- Gas exchange
-
Why do desert cacti possess very few leaf stomata?
- To absorb more oxygen
- To speed up photosynthesis
- To prevent frost damage
- To reduce water loss
-
Which process directly causes water vapour to leave via stomata?
- Osmotic uptake
- Transpiration
- Active transport
- Cell division
-
What is the primary function of air spaces inside a leaf?
- To allow gas movement
- To anchor chloroplasts
- To store liquid water
- To produce glucose
-
Why might a plant wilt on a very hot, sunny day?
- Too much glucose made
- Roots absorbing too fast
- Water lost too fast
- Stomata permanently closed
-
What is the primary function of guard cells in plant leaves?
- Absorb mineral ions
- Produce glucose directly
- Control gas exchange
- Support plant stems
-
Which outer layer of a leaf contains the majority of stomata?
- Epidermis
- Spongy mesophyll
- Xylem vessel
- Palisade layer
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