Diversity of Living Organisms – Animal Kingdom Quiz - ICSE Class 11 Biology

Free practice quiz: Diversity of Living Organisms – Animal Kingdom (ICSE Class 11 Biology). 42 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This ICSE Class 11 Biology practice quiz has 42 multiple-choice questions on Diversity of Living Organisms – Animal Kingdom, and 42 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. Which class of fish is characterized by a cartilaginous skeleton, a ventral mouth with replaceable teeth, and placoid scales?

   1. Osteichthyes
   2. Chondrichthyes
   3. Agnatha
   4. Cyclostomata
   Show answer

   Answer: B. Chondrichthyes

   Chondrichthyes, which includes sharks, rays, and skates, possess a skeleton made entirely of cartilage. They also have placoid scales (dermal denticles), a ventral mouth, and gill slits lacking an operculum.

2. Which class of molluscs is characterized by a shell divided into two halves, hinged together, and a flattened body with a reduced head?

   1. Gastropoda
   2. Cephalopoda
   3. Bivalvia
   4. Polyplacophora
   Show answer

   Answer: C. Bivalvia

   Bivalves, such as clams and oysters, have shells composed of two articulating valves and lack a distinct head and radula. They are also characterized by paired gills and a laterally compressed body.

3. Which of the following is a characteristic of the class Agnatha?

   1. Paired fins
   2. Jawless mouth
   3. Cartilaginous skeleton
   4. Gills covered by operculum
   Show answer

   Answer: B. Jawless mouth

   Agnatha, meaning 'without jaws', represents the jawless fishes like lampreys and hagfish. They lack paired fins and jaws, and their gills are not covered by an operculum.

4. Animals exhibiting metamorphosis, with a larval stage that is morphologically and often ecologically distinct from the adult, are found in which of the following phyla?

   1. Porifera
   2. Cnidaria
   3. Mollusca
   4. All of the above
   Show answer

   Answer: D. All of the above

   Metamorphosis is common across many invertebrate phyla. Porifera have various larval forms, Cnidaria have planula larvae, and Mollusca have trochophore and veliger larvae, all indicating significant changes from larval to adult stages.

5. Which class of mammals is characterized by the presence of a placental embryo and is the most diverse group, including humans?

   1. Monotremata
   2. Marsupialia
   3. Eutheria (Placentalia)
   4. Chondrichthyes
   Show answer

   Answer: C. Eutheria (Placentalia)

   Eutherians, or placental mammals, are characterized by a long gestation period where the embryo develops within the uterus, nourished via a placenta. This group comprises the vast majority of mammal species.

More questions in this quiz

Answers and explanations are in the full quiz.

1. Amphibians are unique among vertebrates due to their ability to live both in water and on land. Which adaptation is crucial for their cutaneous respiration?
2. Which reptilian group is characterized by the absence of limbs, a long cylindrical body, and reduced eyes, often leading to confusion with amphibians?
3. The presence of feathers, hollow bones, and a keeled sternum are adaptations primarily associated with which class of vertebrates?
4. Which of the following is NOT a characteristic feature of mammals?
5. The mesoglea, a jelly-like substance, is a prominent feature of the body wall in which phylum?
6. Which phylum exhibits metameric segmentation and a closed circulatory system?
7. A coelom that is not completely lined by mesodermal epithelium, with the coelomic cavity containing mesodermal cells and organs, is known as:
8. The unique crystalline style, used for aiding digestion in the stomach, is found in members of which phylum?
9. Which of the following arthropod subphyla is characterized by the presence of chelicerae, pedipalps, and eight legs, typically lacking antennae?
10. The development of an amniotic egg, a key innovation for terrestrial life, is a characteristic feature of which vertebrate group?
11. Which of these is an example of an acoelomate animal?
12. The phylum Porifera is distinguished by which of the following characteristics?
13. Which characteristic is NOT found in the phylum Arthropoda?
14. The internal shell, or pen, made of chitin, is a distinctive feature of which class within Mollusca?
15. The 'water vascular system' of echinoderms is primarily involved in:
16. Which group of animals possesses a mantle that secretes a calcareous shell, a muscular foot, and a visceral hump containing organs?
17. The absence of a true coelom and the presence of a branched gastrovascular cavity are characteristic features of:
18. The development of wings and the reduction of the body to head, thorax, and abdomen are key characteristics of which class?
19. The presence of a hydrostatic skeleton is a prominent feature in the locomotion and body support of which phylum?
20. Which class of fish is characterized by bony skeletons, operculated gills, and a swim bladder for buoyancy?
21. The characteristic 'collar cells' or choanocytes, which are flagellated cells responsible for feeding and circulation, are found in:
22. Which group of mammals is characterized by the presence of a marsupium (pouch) for carrying their young?
23. Which feature is unique to the class Aves among all vertebrate classes?
24. The presence of a 'foot' which is a muscular projection used for locomotion and adhesion is a characteristic feature of which phylum?
25. The ability to regenerate lost body parts is particularly prominent in which of the following groups?
26. Which of these classes is characterized by a segmented body, a true coelom, and parapodia which are lateral outgrowths used for locomotion?
27. The absence of a digestive system in adult members is a unique characteristic of which animal group?
28. Which of the following is NOT a characteristic of the phylum Chordata?
29. The phylum Arthropoda is the largest phylum in the animal kingdom and is characterized by all of the following EXCEPT:
30. The body plan of Cnidarians exhibits two basic forms: the sessile polyp and the free-swimming medusa. Which of the following represents a typical polyp form?
31. Which feature is common to both the phyla Annelida and Arthropoda?
32. The presence of spinnerets for producing silk is a characteristic feature of which group within the arthropods?
33. Which phylum is characterized by calcareous ossicles embedded in the dermis, forming a skeleton, and a water vascular system?
34. The term 'amniote' refers to vertebrates that possess an amniotic egg. Which of the following is NOT an amniote?
35. Which of the following is a distinguishing feature of the class Gastropoda within Mollusca?
36. The presence of true, complex tissues and organs, but lacking a circulatory system and a coelom, is found in which phylum?
37. Which group of mammals reproduces by laying eggs?

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