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Excretion in Plants and Animals

Description: Excretion in Plants and Animals
Number of Questions: 10
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Tags: Excretion in Plants and Animals Excretion in animals & Plants
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Public urinals give a pungent smell due to the conversion of

  1. both urea and uric acid into ammonia

  2. uric acid into ammonia by ornithine cycle

  3. urea into ammonia by bacteria

  4. None of these


Correct Option: C
Explanation:

In public urinals, the urine gives a pungent smell due to the conversion of urea into ammonia by bacteria.

The chief nitrogenous waste in the urine of a man or terrestrial mammals is

  1. urea

  2. uric acid

  3. ammonia

  4. none of the above


Correct Option: A
Explanation:

Urea is the chief nitrogenous waste in the urine of a man or terrestrial mammals.

The urine of a man suffering from diabetes insipidus is

  1. sweet and watery

  2. sweet and thick

  3. tasteless and watery

  4. tasteless and thick


Correct Option: C
Explanation:

The urine of a man suffering from diabetes insipidus is tasteless and watery.

Under which of the following conditions the production of urine per day increases?

  1. On a cold damp day

  2. On continuous exercise

  3. On a very warm and dry day

  4. None of the above


Correct Option: A
Explanation:

Urine per day increases on a cold damp day.

Urea is formed by the combination of ammonia and _______ in _______.

  1. oxygen, liver

  2. carbon dioxide, liver

  3. carbon monoxide, kidney

  4. calcium carbonate, liver


Correct Option: B
Explanation:

Urea is formed by the combination of ammonia and carbon dioxide in liver.

In insects, uric acid is temporarily stored in

  1. liver

  2. lungs

  3. fat bodies

  4. cloaca


Correct Option: C
Explanation:

In insects, uric acid is temporarily stored in fat bodies.

Which of the following is a process in which water is lost in the form of water vapours in plants?

  1. Respiration

  2. Guttation

  3. Exosmosis

  4. Transpiration


Correct Option: D
Explanation:

Transpiration is a process in which water is lost in the form of water vapours in plants.

Which of the following is not a function of transpiration?

  1. Translocation of minerals

  2. Excretion of sap

  3. Ascent of sap

  4. Cooling


Correct Option: B
Explanation:

Excretion of sap is not a function of transpiration.

Water is not reabsorbed in

  1. proximal convoluted tubule

  2. descending limb of loop of Henle

  3. ascending limb of loop of Henle

  4. distal convoluted tubule


Correct Option: C
Explanation:

Water is not reabsorbed in ascending limb of loop of Henle.

From which part of a plant does the maximum loss of water through transpiration take place?

  1. Lenticle

  2. Cuticle

  3. Stomata

  4. Rhizoid


Correct Option: C
Explanation:

The maximum loss of water through transpiration takes place through stomata.

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