Question Bank — Animal Kingdom

QUESTION BANK

Chapter: Animal Kingdom (Class 11 Biology – NCERT)

Section A — MCQs (10 questions, 1 mark each)

1. Which of the following phyla exhibits cellular level of organisation?
   (a) Coelenterata (b) Porifera (c) Platyhelminthes (d) Annelida

2. Animals in which the body cavity is not lined by mesoderm but mesoderm occurs as scattered pouches are called:
   (a) Acoelomates (b) Coelomates (c) Pseudocoelomates (d) Triploblastic

3. Assertion (A): All vertebrates are chordates but all chordates are not vertebrates.
   Reason (R): Notochord is replaced by vertebral column in vertebrates.
   (a) Both A and R are true and R is the correct explanation of A.
   (b) Both A and R are true but R is not the correct explanation of A.
   (c) A is true but R is false.
   (d) A is false but R is true.

4. Which phylum shows metameric segmentation?
   (a) Platyhelminthes (b) Aschelminthes (c) Annelida (d) Echinodermata

5. Assertion (A): Cnidarians exhibit alternation of generations (metagenesis).
   Reason (R): Polyps produce medusae asexually and medusae form polyps sexually.
   (a) Both A and R are true and R is the correct explanation of A.
   (b) Both A and R are true but R is not the correct explanation of A.
   (c) A is true but R is false.
   (d) A is false but R is true.

6. The water vascular system is a characteristic feature of:
   (a) Porifera (b) Ctenophora (c) Echinodermata (d) Hemichordata

7. In which of the following is the digestive system incomplete?
   (a) Annelida (b) Arthropoda (c) Platyhelminthes (d) Mollusca

8. Which of the following is a pseudocoelomate?
   (a) Taenia (b) Ascaris (c) Pheretima (d) Asterias

9. Choanocytes are characteristic of:
   (a) Coelenterata (b) Porifera (c) Ctenophora (d) Chordata

10. Which class of vertebrates is poikilothermous and has a cartilaginous endoskeleton with placoid scales?
    (a) Osteichthyes (b) Chondrichthyes (c) Amphibia (d) Reptilia

Section B — Very Short Answer (6 questions, 2 marks each)

1. Differentiate between radial and bilateral symmetry with one example of each from the chapter.

2. What is the difference between diploblastic and triploblastic organisation? Give one example of each.

3. State two characteristic features of phylum Ctenophora.

4. Define notochord. Name the animals that possess it and those that do not.

5. What are flame cells? In which phylum are they found and what is their function?

6. Distinguish between open and closed circulatory systems with one example of each.

Section C — Short Answer (5 questions, 3 marks each)

1. Describe the three types of body cavities (coelom, pseudocoelom and acoelom) with one example of each.

2. Explain the basis of classification of animals on the basis of segmentation and notochord.

3. Write three distinguishing features of phylum Annelida. Give two examples.

4. Describe the two body forms found in cnidarians with suitable examples.

5. List any three features that distinguish chordates from non-chordates.

Section D — Long Answer (3 questions, 5 marks each)

1. Describe the salient features of phylum Arthropoda. Why is it considered the largest phylum of the animal kingdom? Give four examples.

2. Draw a neat labelled diagram of a chordate showing the fundamental chordate characters (notochord, dorsal hollow nerve cord, pharyngeal gill slits and post-anal tail). Describe each character briefly.

3. Compare the features of Chondrichthyes and Osteichthyes. How do these classes differ from Cyclostomata?

Section E — Case/Source-Based (2 questions, 4 marks each)

Case 1

A student collected a marine animal specimen that is radially symmetrical, diploblastic, possesses cnidoblasts on tentacles and shows two body forms — polyp and medusa. It exhibits metagenesis in some members.

Sub-questions:
(a) Identify the phylum of the specimen. (1 mark)
(b) Name the stinging capsules present in the animal and state their function. (1 mark)
(c) Differentiate between the two body forms mentioned. (1 mark)
(d) Give one example each of a polyp and a medusa form. (1 mark)

Case 2

An animal is observed to have a body divisible into proboscis, collar and trunk. It is marine, bilaterally symmetrical, triploblastic and possesses an open circulatory system. It was earlier placed under Chordata but is now a separate phylum.

Sub-questions:
(a) Identify the phylum. (1 mark)
(b) Name the rudimentary notochord-like structure present in the collar region. (1 mark)
(c) State two features that justify its placement as a non-chordate phylum. (1 mark)
(d) Give one example of this phylum. (1 mark)