Tag: biology

Questions Related to biology

Wilting occurs when there is ___________________.

biology types and parts of plants leaves root, stem, and leaves basics of roots and stem

  1. Transpiration higher than absorption

  2. Absorption higher than transpiration

  3. Higher relative humidity of atmosphere

  4. Excess root pressure

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Correct Option: A

The process of loss of water through the leaves and stem is called

biology types and parts of plants leaves root, stem, and leaves basics of roots and stem

  1. Transpiration

  2. Respiration

  3. Photosynthesis

  4. Pollination

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Correct Option: A
Explanation:

Transpiration is the processin which water vapours are released from stomata.

Respiration is a metabolic processes which breaks down complex organic molecules to release energy.
Photosynthesis is the synthesis of sugar in the presence of sunlight, carbon dioxide and water.
Pollination is the transfer of pollen from male organ to female organ of a flower. 
So the correct answer is 'Transpiration'.

In transpiration, water is lost in         form whereas in guttation water is lost in the form of          

biology types and parts of plants leaves root, stem, and leaves basics of roots and stem

  1. Vapour, liquid

  2. Liquid, vapour

  3. Solid, vapour

  4. Vapour, solid

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Correct Option: A
Explanation:

In transpiration water is lost in the form of vapour whereas in guttation water in the form of liquid is lost. The loss of water in transpiration is through stomata whereas in guttation, it occurs through hydathodes.

The process by which plants lose water from leaves by evaporation is called as

biology types and parts of plants leaves root, stem, and leaves basics of roots and stem

  1. Respiration

  2. Photosynthesis

  3. Transpiration

  4. Absorption

Show answer
Correct Option: C
Explanation:

Transpiration is the process of release of water vapour from the stomata. 

Respiration is the process of breakdown of organic compounds to release energy.
Photosynthesis is the process of synthesis of food from inorganic compounds like carbon dioxide and water and sunlight.
Absorption is the uptake of substances into a system like absorption of water by the roots.
So the correct answer is ' Transpiration'.

Transpiration takes place maximum through which of the following structures in plants?

biology types and parts of plants leaves root, stem, and leaves basics of roots and stem

  1. Flowers

  2. Stem

  3. Leaves

  4. Roots

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Correct Option: C
Explanation:

Transpiration is the process of release of water vapour from the stomata.

The stomata are present on the leaves.
Their are other types of transpiration but 90% of it takes place through Stomata.
So the the correct answer is 'Leaves'.

Potometer works on the principle of -

biology types and parts of plants leaves root, stem, and leaves basics of roots and stem

  1. Potential difference between the tip of the

    tube and that of the plant

  2. Amount of water absorbed equals the amount

    transpired

  3. Osmotic pressure

  4. Root pressure

Show answer
Correct Option: B
Explanation:
A potometer is also known as transpirometer, is a device used for measuring the rate of water uptake of a leafy shoot which is almost equal to the water lost through the transpiration. The causes of water absorption are photosynthesis and transpiration.
So, the correct answer is 'Amount of water absorbed is equal to the amount transpired'.

Transpiration is best defined as

biology types and parts of plants leaves root, stem, and leaves basics of roots and stem

  1. loss of water from the plant

  2. loss of water as vapour from the plant

  3. evaporation of water from the surface of leaves

  4. None of the above

Show answer
Correct Option: C
Explanation:

Transpiration is defined as the evaporation of water from plants, especially leaves. It occurs through leaves and other parts of the plant. It happens through leaves while their stomata remains open for the passage of CO2 and O2 during photosynthesis.

So, the answer is option C.


During transpiration, the leaves lose more water from their upper surface.

biology types and parts of plants leaves root, stem, and leaves basics of roots and stem

  1. True

  2. False

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Correct Option: A
Explanation:

During transpiration water is lost from the upper surface of the leaves because the upper surface is being more exposed to the sun and will tend more loss of water.

Hence. the given statement is 'True'

State whether the following statements are True or False. Rewrite the false statements correctly.
Transpiration is the loss of water from the roots of the plant.

biology types and parts of plants leaves root, stem, and leaves basics of roots and stem

  1. True

  2. False

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Correct Option: B
Explanation:

Transpiration is the loss of water in the form of water vapours from aerial parts of the plant such as stems, leaves and flowers. 

Hence, the given statement is 'False'.

Which of the following plants do not transpire?

biology types and parts of plants leaves root, stem, and leaves basics of roots and stem

  1. Algae

  2. Fungi

  3. Submerged hydrophytes

  4. All of the above

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Correct Option: D