ICSE Class 6 Biology - The Leaf - Test 4 (Expert)
1. A plant kept in a closed plastic cover will slowly die mainly because:
A. It produces too much food
B. Gas exchange becomes difficult
C. Roots grow too fast
2. If water supply to leaves is stopped, the first process affected will be:
A. Food formation in leaves
B. Flower blooming
C. Seed dispersal
3. A plant placed in strong wind will lose water faster because:
A. Roots absorb more water
B. Photosynthesis stops
C. Transpiration increases
4. A desert plant survives mainly because it:
A. Has reduced leaf surface area
B. Has more flowers
C. Absorbs oxygen from soil
5. If stomata are artificially blocked, the plant will:
A. Grow faster
B. Stop normal gas exchange
C. Produce more seeds
6. A plant growing under a big tree adapts by:
A. Reducing roots
B. Increasing water loss
C. Using low light efficiently
7. If most leaves of a plant are removed, it will:
A. Grow poorly
B. Grow faster
C. Produce more oxygen
8. In a leaf with green and white patches, food is made only in:
A. White parts
B. Green parts
C. Stem parts
9. Dust on leaves mainly affects:
A. Root absorption
B. Seed growth
C. Light absorption
10. Plants in hot climates usually have:
A. Thick waxy layer
B. No leaves
C. Weak roots
11. A plant wilts during midday mainly due to:
A. Excess oxygen
B. Water loss faster than absorption
C. Extra food storage
12. Floating leaves of water plants mainly help in:
A. Root growth
B. Seed formation
C. Staying on water surface
13. Leaves bend toward sunlight mainly to:
A. Absorb more light
B. Reduce water loss
C. Increase root length
14. During drought conditions, stomata usually:
A. Remain fully open
B. Close partially
C. Multiply in number
15. If transport tissues are damaged, the plant will:
A. Grow faster
B. Only increase flowering
C. Stop normal functioning
16. Increasing sunlight generally:
A. Increases food production
B. Stops water absorption
C. Reduces root growth
17. Thin leaves are useful because they:
A. Store water
B. Allow faster gas exchange
C. Stop transpiration
18. A healthy leaf requires balance of:
A. Soil only
B. Flowers only
C. Light, water, and gases
19. Damaged leaves affect mainly:
A. Food production
B. Seed color
C. Root shape
20. Leaf adaptations are mainly for:
A. Reproduction only
B. Survival efficiency
C. Flower production