NCERT Class 11-Biology: Chapter – 19 Excretory Products and Their Elimination Part 1 (For CBSE, ICSE, IAS, NET, NRA 2022)
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Multiple Choice Questions
Question 1:
The following substances are the excretory products in animals. Choose the least toxic form among them?
a. Urea
b. Uric acid
c. Ammonia
d. Carbon dioxide
Answer: (b)
Question 2:
Filtration of the blood takes place at
a. PCT
b. DCT
c. Collecting ducts
d. Malpighian body
Answer: (d)
Question 3:
Which of the following statements is incorrect.
a. ADH – prevents conversion of angiotensinogen in blood to angiotensin
b. Aldosterone – facilitates water reabsorption
c. ANF – enhances sodium reabsorption
d. Renin – causes vasodilation
Answer: (a)
Question 4:
A large quantity of one of the following is removed from our body by lungs.
a. only
b. only
c. and
d. ammonia
Answer: (c)
Question 5:
The of human urine is approximately
a. 6.5
b. 7
c. 6
d. 7.5
Answer: (c)
Question 6:
Different types of excretory structures and animals are given below. Match them appropriately and mark the correct answer from among those given below:
Excretory structure/organ | Animals | ||
A. | Protonephridia | i. | Prawn |
B. | Nephridia | ii. | Cockroach |
C. | Malpighian tabules | iii. | Earthworm |
D. | Green gland or Antennal gland | iv | Flatworms |
a. (D) i, (C) ii, (B) iii and (A) iv
b. (B) i, (C) ii, (A) iii and (B) iv
c. (D) i, (C) ii, (A) iii and (B) iv
d. (B) i, (C) ii, (B) iii and (D) iv
Answer: (a)
Question 7:
Which one of the following statements is incorrect?
a. Birds and land snails are uricotelic animals.
b. Mammals and frogs are ureotelic animals
c. Aquatic amphibians and aquatic insects are ammonotelic animals
d. Birds and reptiles are ureotelic
Answer: (d)
Question 8:
Which of the following pairs is wrong?
a. Uricotelic … Birds
b. Ureotelic … Insects
c. Ammonotelic … Tadpole
d. Ureotelic … Elephant
Answer: (b)