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Biology MCQ

Transpiration · ICSE STD 10 (ICSE - English Medium). 17 questions.

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17 questions · timed · auto-graded

MCQ 11 Mark
Assertion (A): Lenticels play a crucial role in the aeration of plant tissues.
Reason (R): Guttation is a mechanism for plants to maintain turgor pressure in their cells.
  • ✓
    A is True and R is False.
  • B
    A is False and R is True.
  • C
    Both A and R are True.
  • D
    Both A and R are False.
Answer
Correct option: A.
A is True and R is False.
(A) A is True and R is False.
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MCQ 21 Mark
Which of the following statements is true?
  • ✓
    Higher the temperature, higher is the rate of transpiration
  • B
    Higher the temperature, lower is the rate of transpiration
  • C
    Higher the temperature, slower is the evaporation of water molecules
  • D
    All the above
Answer
Correct option: A.
Higher the temperature, higher is the rate of transpiration
(A) Higher the temperature, higher is the rate of transpiration
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MCQ 31 Mark
When guard cells are turgid, the stomata must be
  • A
    closed
  • B
    neither open nor closed
  • ✓
    open
  • D
    dead
Answer
Correct option: C.
open
(C) open
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MCQ 41 Mark
Evaporation is different from transpiration as the former
  • A
    occurs from aerial parts of the leaf.
  • B
    is a slow process.
  • ✓
    is the loss of water from free surface.
  • D
    involves green plants.
Answer
Correct option: C.
is the loss of water from free surface.
(C) is the loss of water from free surface.
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MCQ 51 Mark
Assertion (A): Guttation is the process by which plants release excess water in the form of droplets from the tips of their leaves.
Reason (R): Guttation occurs when the rate of transpiration is lower than the rate of water absorption by the roots.
  • A
    A is True and R is False.
  • B
    A is False and R is True.
  • ✓
    Both A and R are True.
  • D
    Both A and R are False.
Answer
Correct option: C.
Both A and R are True.
(C) Both A and R are True.
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MCQ 61 Mark
Production of Abscisic Acid (ABA) in leaf causes
  • A
    Stomatal opening
  • B
    Stunted growth
  • ✓
    Reduced rate of transpiration
  • D
    Small fruits
Answer
Correct option: C.
Reduced rate of transpiration
(C) Reduced rate of transpiration
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MCQ 71 Mark
In hot, dry regions, plants adapt to reduce water loss. Cacti have thick water-storing stems and spiny leaves. Acacia trees have small, waxy leaves and deep roots. Succulents store water in thick leaves and have few stomata that open at night.
Which of the following is NOT an adaptation to reduce excessive transpiration?
  • A
    Thick stems that store water
  • B
    Leaves evolving into spines
  • ✓
    Large, broad leaves for photosynthesis
  • D
    Waxy leaves with reduced surface area
Answer
Correct option: C.
Large, broad leaves for photosynthesis
(C) Large, broad leaves for photosynthesis
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MCQ 81 Mark
Which of the following statements are true?
  • ✓
    In guard cells, turgor pressure increases during stomatal opening.
  • B
    Guard cells losses its chloroplasts during stomatal opening.
  • C
    In guard cells turgor pressure decreases during stomatal opening.
  • D
    Guard cells absorbs $O _2$ during photosynthesis
Answer
Correct option: A.
In guard cells, turgor pressure increases during stomatal opening.
(A) In guard cells, turgor pressure increases during stomatal opening.
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MCQ 91 Mark
Which of the following is not an internal factors affecting rate of transpiration?
  • A
    Leaf area
  • ✓
    Humidity
  • C
    Water content
  • D
    Number of stomata
Answer
Correct option: B.
Humidity
(B) Humidity
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MCQ 101 Mark
Assertion (A): Transpiration is higher during the night than during the day.
Reason (R): Stomata are usually closed at night to conserve water.
  • A
    A is True and R is False.
  • ✓
    A is False and R is True.
  • C
    Both A and R are True.
  • D
    Both A and R are False.
Answer
Correct option: B.
A is False and R is True.
(B) A is False and R is True.
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MCQ 111 Mark
1 big tree losses around
  • A
    600 litres of water in a day
  • B
    5 litres of water in a day
  • ✓
    10000 litres of water in a day
  • D
    200 litres of water in a day
Answer
Correct option: C.
10000 litres of water in a day
(C) 10000 litres of water in a day
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MCQ 121 Mark
The upper layer of elongated ground tissue in a leaf are called
  • ✓
    Palisade cells
  • B
    Spongy parenchyma
  • C
    Collenchyma
  • D
    Xylem cells
Answer
Correct option: A.
Palisade cells
(A) Palisade cells
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MCQ 141 Mark
Transpiration occurs
  • ✓
    more from the lower surface of a dicot leaf.
  • B
    equal from both the surfaces of dicot leaf.
  • C
    more from the upper surface of a dicot leaf.
  • D
    more from upper surface of a monocot leaf
Answer
Correct option: A.
more from the lower surface of a dicot leaf.
(A) more from the lower surface of a dicot leaf.
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MCQ 151 Mark
Guttation occurs when
  • A
    Root pressure is low and transpiration is high.
  • ✓
    Root pressure is high and transpiration is low.
  • C
    Root pressure and transpiration rate are equal.
  • D
    Root pressure is low and transpiration is low.
Answer
Correct option: B.
Root pressure is high and transpiration is low.
(B) Root pressure is high and transpiration is low.
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MCQ 161 Mark
All are functions of transpiration except
  • A
    Intake of water from soil
  • B
    Cooling of plant
  • ✓
    Excretion of minerals
  • D
    Translocation of water and minerals
Answer
Correct option: C.
Excretion of minerals
(C) Excretion of minerals
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MCQ 171 Mark
Loss of water in the form of liquid droplet occurs through
  • A
    transpiration
  • ✓
    guttation
  • C
    both transpiration and guttation
  • D
    bleeding
Answer
Correct option: B.
guttation
(B) guttation
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