Lesson T2.1.3
T2.1.3 Adaptations of leaves for photosynthesis Quiz: KS3 Biology, Unit 2
20 questions
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Lesson T2.1.3, Adaptations of leaves for photosynthesis: 20 multiple choice questions for the KS3 Biology (National Curriculum), Unit 2: Material cycles and energy, written with Revision Ninja.
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The 20 questions
-
Why are typical plant leaves broad and flat?
- To store water
- To deter herbivores
- Small surface area
- Large surface area
-
Why are most plant leaves thin?
- Short diffusion distance
- Large surface area
- To absorb heat
- To store water
-
Where are most chloroplasts found inside a leaf?
- Spongy layer
- Lower epidermis
- Palisade layer
- Waxy cuticle
-
On which side of a typical leaf are most stomata found?
- Leaf edges only
- Lower surface
- Inside the veins
- Upper surface
-
What is the primary function of leaf stomata?
- Gas exchange
- Light absorption
- Glucose production
- Water absorption
-
What is the main role of guard cells in a leaf?
- Opening stomata
- Transporting water
- Producing glucose
- Absorbing sunlight
-
What is the main function of the waxy cuticle on a leaf?
- Exchanging gases
- Absorbing sunlight
- Reducing water loss
- Transporting sugars
-
What do xylem vessels transport up to the leaves?
- Oxygen and carbon dioxide
- Sugars and amino acids
- Starch and proteins
- Water and minerals
-
What do phloem tubes primarily transport away from leaves?
- Carbon dioxide
- Water
- Sugars
- Mineral ions
-
What dissolved food substance do phloem tubes transport?
- Sugars
- Minerals
- Starch
- Water
-
What is a key property of the upper epidermis in a leaf?
- Transparent
- Opaque
- Green
- Thickly waxed
-
Which feature of spongy mesophyll cells allows rapid gas exchange?
- Waxy cuticles
- Large air spaces
- Thick cell walls
- Dense chloroplasts
-
Which leaf adaptation is most likely in a plant grown in shade?
- Fewer stomata
- Thicker cuticles
- Narrow spines
- Larger leaves
-
Why do desert cacti have spines instead of broad leaves?
- To collect rainwater
- To reduce water loss
- To absorb more sunlight
- To capture insects
-
Which leaf structure allows carbon dioxide to enter from the air?
- Palisade layer
- Stomata
- Xylem
- Waxy cuticle
-
Which pigment gives leaves their green colour?
- Haemoglobin
- Carotene
- Chlorophyll
- Melanin
-
What do guard cells do on a hot, dry day to conserve water?
- Absorb light
- Shed leaves
- Close stomata
- Expand vacuoles
-
Which tissue contains the most chloroplasts for light absorption?
- Spongy mesophyll
- Guard cells
- Palisade mesophyll
- Upper epidermis
-
What is the direct effect of a blocked stoma on photosynthesis?
- Remains unchanged
- Speeds up
- Stops completely
- Slows down
-
Why do spongy mesophyll cells have a large internal surface area?
- Quick water storage
- Easy sugar transport
- Fast gas diffusion
- Strong physical support
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