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Excretion in Plants and Animals

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What do you understand by metabolic wastes?

  1. The wastes including metals

  2. The wastes produced by factories

  3. The wastes produced by the chemical processes in living beings

  4. The wastes which cannot be degraded


Correct Option: C
Explanation:

The correct option is (3).

Which of the following is/are not included in the wastes produced by human beings?

  1. Urea

  2. Ammonia

  3. Salts

  4. Oxygen


Correct Option: D
Explanation:

The correct option is (4).

Which of the following statements is/are false about human kidneys?

  1. Kidneys are located in front of the stomach.

  2. The left kidney is slightly above the right one.

  3. Nephron is the basic structural unit of kidney.

  4. All of the above


Correct Option: A
Explanation:

Kidneys are located at the back of the stomach. 

What replaces urea in reptilian urine?

  1. Ammonia

  2. Iron

  3. Uric acid

  4. Acetic acid


Correct Option: C
Explanation:

The correct option is (3).

Urine passes out of the body through

  1. ureter

  2. rectum

  3. anus

  4. urethra


Correct Option: D
Explanation:

The correct option is (4).

Which of the following is not an excretory product of plants?

  1. Carbon dioxide

  2. Resin

  3. Oil

  4. Gum


Correct Option: A
Explanation:

The correct option is (1).

Which of the following statements is not true about the human urinary system?

  1. It has a pair of urethras.

  2. The kidneys filter the blood to remove wastes and produce urine.

  3. The urinary bladder stores the urine.

  4. It has a pair of ureters.


Correct Option: A
Explanation:

Option (1) is correct.

Bladder is an organ

  1. that has a network of capillaries

  2. that forms a common tube called ureter

  3. that stores urine temporarily before elimination

  4. in which filtration is accomplished


Correct Option: C
Explanation:

The correct option is (3).

What is the cup-shaped structure of nephron called?

  1. Bowman’s capsule

  2. Glomerulus

  3. Tubule

  4. Renal artery


Correct Option: A
Explanation:

The correct option is (1).

Urea is produced by the metabolism of

  1. carbohydrates

  2. proteins

  3. fats

  4. minerals


Correct Option: B
Explanation:

The correct option is (2). Urea is produced by the metabolism of proteins. 

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