1. Which phylum shows radial symmetry in adults but bilateral symmetry in larvae?
1. Arthropoda
2. Echinodermata
3. Mollusca
4. Coelenterata
2. Metagenesis is exhibited by:
| 1. |
Aurelia |
2. |
Obelia |
| 3. |
Hydra |
4. |
Pleurobrachia |
3. A fish with placoid scales is:
1. Catla
2. Rohu
3. Shark
4. Pomfret
4. The rasping organ used for feeding in molluscs is called:
1. Radula
2. Mantle
3. Parapodia
4. Foot
5. Which of these animals exhibits bioluminescence?
1. Pleurobrachia
2. Nereis
3. Pila
4. Ascaris
6. Blood-filled cavity in arthropods is characteristic of:
| 1. |
Closed circulatory system |
| 2. |
Open circulatory system |
| 3. |
Direct circulation |
| 4. |
No circulation |
7. Free-floating medusoid form is found in:
1. Porifera
2. Cnidaria
3. Platyhelminthes
4. Aschelminthes
8. Lateral appendages called parapodia are found in:
1. Nereis
2. Pheretima
3. Hirudinaria
4. Fasciola
9. Which of these is an egg-laying mammal?
1. Whale
2. Bat
3. Platypus
4. Dolphin
10. Animals with chitinous exoskeleton belong to phylum:
| 1. |
Mollusca |
2. |
Arthropoda |
| 3. |
Annelida |
4. |
Echinodermata |
11. The book lungs are respiratory organs found in:
1. Prawns
2. Scorpions
3. Butterflies
4. Locusts
12. Which feature is NOT characteristic of triploblastic animals?
1. Presence of mesoderm
2. Bilateral symmetry
3. Presence of true coelom
4. Presence of mesoglea
13. Flame cells are excretory structures found in:
1. Roundworms
2. Flatworms
3. Earthworms
4. Sponges
14. The water vascular system is characteristic of:
1. Mollusca
2. Echinodermata
3. Coelenterata
4. Porifera
15. Which of these animals has a closed circulatory system?
1. Cockroach
2. Prawn
3. Earthworm
4. Spider
16. Which of the following combinations correctly matches the animal with its characteristic feature?
| 1. |
Pila - Jointed appendages |
| 2. |
Asterias - Water vascular system |
| 3. |
Parrot - Placoid scales |
| 4. |
Torpedo - Perching ability |
17. A closed circulatory system is found in
| 1. |
Arthropods and molluscs |
| 2. |
Annelids and vertebrates |
| 3. |
Echinoderms and hemichordates |
| 4. |
Platyhelminthes and aschelminthes |
18. Which of the following animals exhibits true metameric segmentation?
1. Prawn
2. Earthworm
3. Tapeworm
4. Liver fluke
19. The excretory organs in different animals are correctly matched in
| 1. |
Balanoglossus - Flame cells |
| 2. |
Leech - Malpighian tubules |
| 3. |
Earthworm - Nephridia |
| 4. |
Sea urchin - Proboscis gland |
20. Which of the following characteristics is NOT shared by birds and mammals?
| 1. |
Warm-blooded nature |
| 2. |
Four-chambered heart |
| 3. |
Nucleated RBCs |
| 4. |
Complete separation of oxygenated and deoxygenated blood |
21. The water vascular system is characteristic of
1. Mollusca
2. Echinodermata
3. Porifera
4. Coelenterata
22. Which of the following animals has cnidoblasts?
1. Sycon
2. Hydra
3. Pleurobrachia
4. Planaria
23. The respiratory organs in arthropods include all EXCEPT
1. Gills
2. Book lungs
3. Tracheal system
4. Ctenidia
24. Animals with pseudocoelom include
1. Platyhelminthes
2. Aschelminthes
3. Annelida
4. Arthropoda
25. Which feature is common to leech, earthworm and tapeworm?
| 1. |
Presence of segments |
| 2. |
Hermaphroditism |
| 3. |
Closed circulatory system |
| 4. |
Triploblastic nature |
26. Which animal group shows both radial and bilateral symmetry during its life cycle?
1. Porifera
2. Coelenterata
3. Echinodermata
4. Ctenophora
27. A characteristic feature of chordates is
1. Bilateral symmetry
2. Triploblastic nature
3. Presence of notochord
4. Coelomic cavity
28. The body cavity which is lined by mesoderm is called
1. Pseudocoelom
2. Coelom
3. Haemocoel
4. Gastrovascular cavity
29. Which of the following is correctly matched?
| 1. |
Fasciola - Flame cells |
| 2. |
Ascaris - Malpighian tubules |
| 3. |
Pheretima - Protonephridia |
| 4. |
Locusta - Green glands |
30. Which of the following is NOT a characteristic feature that distinguishes chordates from non-chordates?
1. Presence of a notochord
2. Bilateral symmetry
3. Dorsal hollow nerve cord
4. Post-anal tail
31. The body cavity in pseudocoelomates is:
| 1. |
Lined by mesoderm |
| 2. |
Absent |
| 3. |
Present between mesoderm and endoderm |
| 4. |
Not lined by mesoderm |
32. Coelom formation in triploblastic animals is associated with which germ layer?
1. Ectoderm only
2. Endoderm only
3. Mesoderm only
4. Both ectoderm and endoderm
33. Which of these represents the correct sequence of evolutionary advancement in body cavity?
| 1. |
Acoelomate → Pseudocoelomate → Coelomate |
| 2. |
Pseudocoelomate → Acoelomate → Coelomate |
| 3. |
Coelomate → Acoelomate → Pseudocoelomate |
| 4. |
Acoelomate → Coelomate → Pseudocoelomate |
34. A key adaptation in amphibians that helped them colonize land is:
| 1. |
Scales on skin |
| 2. |
Mucus-secreting glands in skin |
| 3. |
Dry skin |
| 4. |
Internal fertilization |
35. Which feature is unique to reptiles among vertebrates?
1. Amniotic egg
2. Internal fertilization
3. Paired appendages
4. Vertebral column
36. Which of these mammalian features provides better temperature regulation?
1. Four-chambered heart
2. Diaphragm
3. Hair/fur
4. Mammary glands
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