Biology Class 11th Chapter 4 mcqs

1. Which one of the following is NOT a characteristic of phylum Annelida?

(a) Ventral nerve cord

(b) Closed circulatory system

(c) Segmentation

(d) Pseudocoelom

Answer: (d) Pseudocoelom

2. ______ are devoid of respiratory, excretory and circulatory organs.

(a) Threadworms

(b) Sponges

(c) Tapeworms

(d) Liver fluke

Answer: (b) Sponges

3. Fluke infections are diseases of the _______ in humans.

(a) Blood

(b) Bile

(c) Digestive tract

(d) Lungs

Answer: (c) Digestive tract

4. Water-Vascular system is found in

(a) Sea-anemone

(b) Sea-pen

(c) Sea-cucumber

(d) Sea-horse

Answer: (c) Sea-cucumber

5. Order Rhynchocephalia consists of

(a) Tuataras

(b) Lizards and snakes

(c) Turtles and tortoises

(d) Crocodiles, alligators, caimans

Answer: (a) Tuataras

6. Sharks, skates, and rays are also called ______ fishes.

(a) Jawless

(b) Bony

(c) Cartilaginous

(d) Freshwater

Answer: (c) Cartilaginous

7. Turtles are

(a) Arthropods

(b) Pisces

(c) Reptiles

(d) Molluscs

Answer: (c) Reptiles

8. The clam nervous system is composed of

(a) labial palps

(b) one pair of ganglia

(c) two pairs of ganglia

(d) three pairs of ganglia

Answer: (d) three pairs of ganglia

9. Choose the correct pair.

(a) Hippocampus – 3-chambered heart

(b) Rana – 2-chambered heart

(c) Crocodilus – 4-chambered heart

(d) Pavo – 3-chambered heart

Answer: (c) Crocodilus – 4-chambered heart

10. Who wrote the book Systema Naturae?

(a) Lamarck

(b) Darwin

(c) Wallace

(d) Linnaeus

Answer: (d) Linnaeus

11. Which of the following statement is correct?

(a) Platypus lays eggs

(b) Camels have biconcave RBCs

(c) Whales respire by gills

(d) Bats do not fly

Answer: (a) Platypus lays eggs

12. Osteichthyes belongs to

(a) class amphibia

(b) super class pisces

(c) super class tetrapoda

(d) division agnatha

Answer: (b) super class pisces

13. Which one of the following groups of animals is correctly matched with its one characteristic feature without even a single exception?

(a) Mammalia : give birth to young ones

(b) Reptilia : possess 3-chambered heart with one incompletely divided ventricle

(c) Chordata : possess a mouth provided with an upper and a lower jaw

(d) Chondrichthyes : possess cartilaginous endoskeleton

Answer: (d) Chondrichthyes : possess cartilaginous endoskeleton

14. Which one of the following phylum is characterized by absence of true coelom?

(a) Annelida

(b) Mollusca

(c) Echinodermata

(d) Nematoda

Answer: (d) Nematoda

15. Which of the following is a pseudocoelomate?

(a) Platyhelminthes

(b) Aschelminthes

(c) Mollusca

(d) Hemi-chordates

Answer: (b) Aschelminthes

16. Which kind of symmetry occurs in sea anemone?

(a) Bilateral

(b) Radial

(c) Asymmetry

(d) None of these

Answer: (b) Radial

17. Phylum that doesnt have a true coelom is

(a) Platyhelminthes

(b) Annelida

(c) Echinoderms

(d) Arthropoda

Answer: (a) Platyhelminthes

18. Male mosquitoes usually feed on

(a) Garbage

(b) Human blood

(c) Flower sap

(d) All of the above

Answer: (c) Flower sap

19. Bed Bugs contribute to the spread of

(a) Typhoid

(b) Yellow fever

(c) Typhus

(d) Trench fever

Answer: (c) Typhus