1.Which of the following is a characteristic feature of animals?
(A) Autotrophic nutrition
(B) Cell wall
(C) Multicellular and heterotrophic
(D) Presence of chloroplast
Answer: (C) Multicellular and heterotrophic
Explanation: Animals are multicellular and depend on other organisms for food, unlike plants that have chloroplasts and can make their own food.
2. Which phylum is characterised by spiny skin and water vascular system?
(A) Mollusca
(B) Arthropoda
(C) Echinodermata
(D) Annelida
Answer: (C) Echinodermata
Explanation: Echinoderms (e.g., starfish, sea urchins) have spiny skin and a unique water vascular system for movement and feeding.
3. In which of the following organisms is the notochord present throughout life?
(A) Amphioxus
(B) Frog
(C) Human
(D) Fish
Answer: (A) Amphioxus
Explanation: Amphioxus (a cephalochordate) retains the notochord throughout its life, whereas vertebrates replace it with a vertebral column.
4. Which phylum includes the largest number of species?
(A) Arthropoda
(B) Mollusca
(C) Chordata
(D) Echinodermata
Answer: (A) Arthropoda
Explanation: Arthropoda (e.g., insects, spiders, crabs) is the largest phylum, comprising about 80% of all known animal species.
5. Which of the following is a feature of mammals?
(A) Exoskeleton
(B) Poikilothermy
(C) Presence of mammary glands
(D) External fertilization
Answer: (C) Presence of mammary glands
Explanation: Mammals are characterized by mammary glands, which produce milk to nourish their young.
6. The body of sponges has:
(A) Segmentation
(B) Pseudocoelom
(C) Pores
(D) Radial symmetry
Answer: (C) Pores
Explanation: Sponges (Phylum Porifera) have numerous pores (ostia) that help in water circulation for filter feeding.
7. Which animal group possesses an open circulatory system?
(A) Amphibians
(B) Mammals
(C) Arthropods
(D) Annelids
Answer: (C) Arthropods
Explanation: In arthropods (e.g., insects, crabs), blood is not confined to vessels and flows freely within body cavities.
8. Which of the following organisms belongs to Phylum Platyhelminthes?
(A) Roundworm
(B) Earthworm
(C) Planaria
(D) Leech
Answer: (C) Planaria
Explanation: Planaria is a flatworm and belongs to Phylum Platyhelminthes, known for their dorsoventrally flattened bodies.
9. Which phylum consists of animals with jointed appendages?
(A) Mollusca
(B) Echinodermata
(C) Arthropoda
(D) Annelida
Answer: (C) Arthropoda
Explanation: Arthropods have segmented bodies with jointed appendages for movement and manipulation.
MCQs on Kingdom Animalia
10. What is the excretory organ in annelids?
(A) Kidneys
(B) Malpighian tubules
(C) Flame cells
(D) Nephridia
Answer: (D) Nephridia
Explanation: Annelids (e.g., earthworms) use nephridia for excretion, functioning like primitive kidneys.
11. The body symmetry in adult echinoderms is:
(A) Bilateral
(B) Radial
(C) Asymmetrical
(D) None of the above
Answer: (B) Radial
Explanation: Adult echinoderms (e.g., starfish) exhibit radial symmetry, while their larvae are bilaterally symmetrical.
12. Which of the following animals is a cold-blooded vertebrate?
(A) Dog
(B) Frog
(C) Pigeon
(D) Dolphin
Answer: (B) Frog
Explanation: Frogs (amphibians) are ectothermic, meaning their body temperature depends on the external environment.
13. Which phylum includes soft-bodied animals, often protected by a shell?
(A) Annelida
(B) Mollusca
(C) Arthropoda
(D) Echinodermata
Answer: (B) Mollusca
Explanation: Mollusks (e.g., snails, octopuses) have soft bodies, often covered by a calcium carbonate shell.
14. Which structure is absent in all non-chordates?
(A) Notochord
(B) Exoskeleton
(C) Segmentation
(D) Bilateral symmetry
Answer: (A) Notochord
Explanation: Only chordates possess a notochord at some stage in their life cycle.
15. Birds are included in which class?
(A) Mammalia
(B) Amphibia
(C) Aves
(D) Reptilia
Answer: (C) Aves
Explanation: Birds belong to class Aves, characterised by feathers, hollow bones, and flight adaptations.
16. Which of the following is NOT a characteristic of amphibians?
(A) Dual life (aquatic & terrestrial)
(B) Three-chambered heart
(C) Amniotic egg
(D) Moist skin
Answer: (C) Amniotic egg
Explanation: Amphibians lay eggs in water without an amniotic membrane, unlike reptiles, birds, and mammals.
17. The respiratory organ in most aquatic arthropods is:
(A) Lungs
(B) Gills
(C) Trachea
(D) Skin
Answer: (B) Gills
Explanation: Most aquatic arthropods (e.g., crabs, prawns) respire through gills.
18. Which of the following animals has an endoskeleton made of cartilage?
(A) Shark
(B) Whale
(C) Lizard
(D) Eagle
Answer: (A) Shark
Explanation: Sharks belong to Class Chondrichthyes, which have cartilaginous skeletons.
19. Which of the following is an example of a coelenterate?
(A) Starfish
(B) Jellyfish
(C) Earthworm
(D) Snail
Answer: (B) Jellyfish
Explanation: Coelenterates (Phylum Cnidaria) include jellyfish, which have radial symmetry and cnidocytes (stinging cells).
20. The ability of some animals to regrow lost body parts is called:
(A) Fragmentation
(B) Regeneration
(C) Budding
(D) Parthenogenesis
Answer: (B) Regeneration
Explanation: Regeneration (e.g., in starfish and planaria) is the process where animals regrow lost body parts.
21. Which of the following animals shows indirect development?
(A) Frog
(B) Dog
(C) Earthworm
(D) Snail
Answer: (A) Frog
Explanation: Frogs undergo indirect development, where the larval stage (tadpole) transforms into an adult through metamorphosis.
22. In which group of animals does fertilization occur externally?
(A) Reptiles
(B) Birds
(C) Amphibians
(D) Mammals
Answer: (C) Amphibians
Explanation: Amphibians (e.g., frogs) lay eggs in water where fertilization occurs externally.
23. Which phylum contains animals that are exclusively marine?
(A) Arthropoda
(B) Mollusca
(C) Echinodermata
(D) Annelida
Answer: (C) Echinodermata
Explanation: Echinoderms (e.g., starfish, sea urchins) are exclusively marine animals with a water vascular system.
24. Which feature is NOT found in birds?
(A) Pneumatic bones
(B) Mammary glands
(C) Four-chambered heart
(D) Feathers
Answer: (B) Mammary glands
Explanation: Birds (Aves) do not have mammary glands, which are characteristic of mammals.
25. Which of the following is a characteristic of reptiles?
(A) Moist skin
(B) External fertilization
(C) Cold-blooded nature
(D) Gills for respiration
Answer: (C) Cold-blooded nature
Explanation: Reptiles are ectothermic (cold-blooded) and rely on external heat sources to regulate their body temperature.
26. Which class of animals is known as “jawless fishes”?
(A) Chondrichthyes
(B) Osteichthyes
(C) Cyclostomata
(D) Amphibia
Answer: (C) Cyclostomata
Explanation: Cyclostomes (e.g., lampreys and hagfishes) are jawless fishes with a circular mouth.
27. The excretory organs in insects are:
(A) Nephridia
(B) Kidneys
(C) Malpighian tubules
(D) Green glands
Answer: (C) Malpighian tubules
Explanation: Insects use Malpighian tubules to remove nitrogenous wastes.
28. The term “metamerism” refers to:
(A) The division of the body into similar segments
(B) The ability to regenerate
(C) Presence of a notochord
(D) Having a coelom
Answer: (A) The division of the body into similar segments
Explanation: Metamerism is seen in annelids, where the body is divided into repetitive segments.
29. Which of the following is an acoelomate animal?
(A) Earthworm
(B) Planaria
(C) Roundworm
(D) Snail
Answer: (B) Planaria
Explanation: Acoelomates (like Planaria) lack a body cavity between the gut and body wall.
30. Which feature distinguishes mammals from all other vertebrates?
(A) Four-chambered heart
(B) Warm-blooded nature
(C) Hair or fur
(D) Internal fertilization
Answer: (C) Hair or fur
Explanation: Hair or fur is a unique feature of mammals that helps in temperature regulation.
31. What type of symmetry do cnidarians exhibit?
(A) Radial
(B) Bilateral
(C) Asymmetrical
(D) Spherical
Answer: (A) Radial
Explanation: Cnidarians (e.g., jellyfish, corals) exhibit radial symmetry, where body parts are arranged around a central axis.
32. Which of the following is a characteristic of arthropods?
(A) Jointed appendages
(B) Water vascular system
(C) Flame cells
(D) Notochord
Answer: (A) Jointed appendages
Explanation: Arthropods (e.g., insects, crabs) have jointed appendages, making them highly mobile and adaptable.
33. The respiratory organ in most mollusks is:
(A) Lungs
(B) Trachea
(C) Gills
(D) Book lungs
Answer: (C) Gills
Explanation: Most mollusks (e.g., octopuses, clams) use gills for respiration, although some terrestrial species use a lung-like structure.
34. Which class of vertebrates lays amniotic eggs?
(A) Amphibia
(B) Reptilia
(C) Osteichthyes
(D) Cyclostomata
Answer: (B) Reptilia
Explanation: Reptiles lay amniotic eggs with protective shells, allowing them to reproduce on land.
35. Which of the following animals belongs to Class Chondrichthyes?
(A) Catfish
(B) Tuna
(C) Stingray
(D) Goldfish
Answer: (C) Stingray
Explanation: Chondrichthyes (cartilaginous fishes) include sharks, rays, and skates, which have skeletons made of cartilage.
36. Which of the following phyla includes parasitic and free-living roundworms?
(A) Platyhelminthes
(B) Annelida
(C) Nematoda
(D) Porifera
Answer: (C) Nematoda
Explanation: Nematodes (roundworms) include both free-living and parasitic species, such as Ascaris and hookworms.
37. Which phylum consists of animals with an asymmetrical body plan?
(A) Porifera
(B) Cnidaria
(C) Echinodermata
(D) Annelida
Answer: (A) Porifera
Explanation: Sponges (Porifera) are asymmetrical, meaning they lack a defined body shape or symmetry.
38. Which of the following is an example of a hermaphrodite?
(A) Cockroach
(B) Frog
(C) Earthworm
(D) Shark
Answer: (C) Earthworm
Explanation: Earthworms possess both male and female reproductive organs, making them hermaphrodites.
39. Which of the following is a viviparous animal?
(A) Lizard
(B) Frog
(C) Dog
(D) Turtle
Answer: (C) Dog
Explanation: Viviparous animals (e.g., dogs, humans) give birth to live young instead of laying eggs.
40. Which feature is common in all chordates?
(A) Exoskeleton
(B) Notochord
(C) Open circulatory system
(D) Radial symmetry
Answer: (B) Notochord
Explanation: All chordates have a notochord at some stage of their development, which provides structural support.
41. Which of the following is an example of an oviparous animal?
(A) Whale
(B) Crocodile
(C) Bat
(D) Kangaroo
Answer: (B) Crocodile
Explanation: Oviparous animals lay eggs, and crocodiles belong to this category. In contrast, whales, bats, and kangaroos give birth to live young.
42. Which type of skeleton is found in vertebrates?
(A) Exoskeleton
(B) Hydrostatic skeleton
(C) Endoskeleton
(D) None of the above
Answer: (C) Endoskeleton
Explanation: Vertebrates have an endoskeleton (internal skeleton) made of cartilage or bone for support and protection.
43. Which group of animals is characterised by the presence of an exoskeleton?
(A) Annelida
(B) Mollusca
(C) Arthropoda
(D) Echinodermata
Answer: (C) Arthropoda
Explanation: Arthropods (e.g., insects, crabs) have a chitinous exoskeleton that provides protection and structural support.
44. Which of the following organisms has a closed circulatory system?
(A) Prawn
(B) Earthworm
(C) Snail
(D) Crab
Answer: (B) Earthworm
Explanation: Earthworms (Annelida) have a closed circulatory system, where blood flows through vessels, unlike arthropods and mollusks.
45. Which of the following is a characteristic of amphibians?
(A) They lay eggs with a hard shell
(B) They have dry, scaly skin
(C) They can live both in water and on land
(D) They have an exoskeleton
Answer: (C) They can live both in water and on land
Explanation: Amphibians (e.g., frogs, salamanders) live in both aquatic and terrestrial environments and breathe through lungs and skin.
46. Which of the following is a distinguishing feature of mammals?
(A) Feathers
(B) Cold-blooded nature
(C) Mammary glands
(D) Three-chambered heart
Answer: (C) Mammary glands
Explanation: Mammals have mammary glands, which produce milk to nourish their young a key characteristic of the group.
47. Which of the following groups belongs to phylum Cnidaria?
(A) Snails and clams
(B) Jellyfish and corals
(C) Starfish and sea urchins
(D) Earthworms and leeches
Answer: (B) Jellyfish and corals
Explanation: Cnidarians (e.g., jellyfish, corals) have stinging cells (cnidocytes) for defense and capturing prey.
48. Which of these animals belongs to the phylum Annelida?
(A) Snail
(B) Tapeworm
(C) Spider
(D) Leech
Answer: (D) Leech
Explanation: Leeches are segmented worms that belong to Phylum Annelida, known for their true coelom and segmented bodies.
49. What is the primary function of the lateral line system in fishes?
(A) Respiration
(B) Detecting vibrations in water
(C) Balancing body temperature
(D) Digestion
Answer: (B) Detecting vibrations in water
Explanation: The lateral line system in fish helps them sense movements and vibrations in the surrounding water, aiding in navigation and predator avoidance.
50. Which of the following is NOT a characteristic of Phylum Platyhelminthes?
(A) Bilateral symmetry
(B) Segmented body
(C) Acoelomate body structure
(D) Parasitic and free-living species
Answer: (B) Segmented body
Explanation: Platyhelminthes (flatworms) are unsegmented and have a flattened body. Some are parasitic (e.g., tapeworms), while others are free-living (e.g., planaria).