NEET PYQs – Chapter 4: Animal Kingdom (PART 2)

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 NEET PYQs – Chapter 4: Animal Kingdom (PART 2)

Sure! Here’s the continuation with questions 26 to 50 for Chapter 4: Animal Kingdom.

26. Which of the following is found in humans but not in frogs?

  • A) Cloaca

  • B) External ear

  • C) 3-chambered heart

  • D) Webbed feet
    ✅ Answer: B) External ear
    Explanation: Humans have external ears (pinna), which frogs lack. Frogs have a tympanic membrane for hearing.

27. Which of the following is a characteristic of reptiles?

  • A) Oviparous with external fertilization

  • B) Ovoviviparous with internal fertilization

  • C) Viviparous with internal fertilization

  • D) Oviparous with internal fertilization
    ✅ Answer: B) Ovoviviparous with internal fertilization
    Explanation: Most reptiles lay eggs (oviparous), but some, like certain species of snakes, exhibit ovoviviparity.

28. Which of these animals have a true coelom?

  • A) Earthworm

  • B) Hydra

  • C) Planaria

  • D) Roundworm
    ✅ Answer: A) Earthworm
    Explanation: Earthworms are coelomates, with a true coelom (body cavity) lined by mesoderm, unlike other options.

29. What is the digestive system type in phylum Arthropoda?

  • A) Complete digestive system

  • B) Incomplete digestive system

  • C) Digestive cavity

  • D) No digestive system
    ✅ Answer: A) Complete digestive system
    Explanation: Arthropods have a well-developed complete digestive system with a mouth and anus.

30. The most primitive group of vertebrates is:

  • A) Cartilaginous fishes

  • B) Jawless fishes

  • C) Amphibians

  • D) Reptiles
    ✅ Answer: B) Jawless fishes
    Explanation: Jawless fishes (Agnatha), such as lampreys and hagfishes, are considered the most primitive vertebrates.

31. Which of the following is characteristic of class Chondrichthyes?

  • A) Cartilaginous skeleton

  • B) External fertilization

  • C) Lungs

  • D) Viviparous reproduction
    ✅ Answer: A) Cartilaginous skeleton
    Explanation: Cartilaginous fish like sharks have a skeleton made of cartilage, not bone.

32. Which of these is the largest living invertebrate?

  • A) Elephant trunk

  • B) Giant squid

  • C) Blue whale

  • D) Cuttlefish
    ✅ Answer: B) Giant squid
    Explanation: The giant squid (Architeuthis) holds the record for being the largest invertebrate.

33. Which is a feature of all chordates?

  • A) Notochord

  • B) Vertebral column

  • C) Bilateral symmetry

  • D) All of these
    ✅ Answer: D) All of these
    Explanation: All chordates possess a notochord, bilateral symmetry, and a vertebral column in the adult or larval stage.

34. Exoskeleton is present in:

  • A) Arthropoda

  • B) Mollusca

  • C) Annelida

  • D) Echinodermata
    ✅ Answer: A) Arthropoda
    Explanation: Arthropods have an exoskeleton made of chitin that provides structural support and protection.

35. Amphibia includes which of the following?

  • A) Fish

  • B) Amphibians

  • C) Reptiles

  • D) Birds
    ✅ Answer: B) Amphibians
    Explanation: Amphibia includes animals like frogs, toads, and salamanders.

36. The main characteristic feature of mammals is:

  • A) Presence of four limbs

  • B) Mammary glands

  • C) Warm-blooded

  • D) Live birth
    ✅ Answer: B) Mammary glands
    Explanation: Mammals are defined by the presence of mammary glands that secrete milk for feeding their young.

37. Which is the largest group of animals in terms of species?

  • A) Mammals

  • B) Arthropoda

  • C) Mollusca

  • D) Reptiles
    ✅ Answer: B) Arthropoda
    Explanation: Arthropoda, with its species diversity, makes up around 80% of the world's species.

38. Which class has both lungs and gills for respiration?

  • A) Amphibia

  • B) Mammalia

  • C) Aves

  • D) Reptilia
    ✅ Answer: A) Amphibia
    Explanation: Amphibians like frogs use both gills in their larval stage and lungs as adults for respiration.

39. The vascular system in echinoderms is:

  • A) Closed circulatory system

  • B) Open circulatory system

  • C) Water vascular system

  • D) None of these
    ✅ Answer: C) Water vascular system
    Explanation: Echinoderms have a unique water vascular system that aids in movement, feeding, and gas exchange.

40. Which animal is viviparous and produces a leathery egg?

  • A) Shark

  • B) Lizard

  • C) Bat

  • D) Mammal
    ✅ Answer: A) Shark
    Explanation: Some species of sharks give birth to live young (viviparous), and others produce leathery eggs (ovoviviparous).

41. Which of these animals has the least body segmentation?

  • A) Earthworm

  • B) Cockroach

  • C) Tapeworm

  • D) Anemone
    ✅ Answer: C) Tapeworm
    Explanation: Tapeworms show very little segmentation compared to the other examples.

42. Which phylum is characterized by bilateral symmetry and a triploblastic body plan?

  • A) Cnidaria

  • B) Platyhelminthes

  • C) Mollusca

  • D) Annelida
    ✅ Answer: B) Platyhelminthes
    Explanation: Flatworms (Platyhelminthes) are bilaterally symmetrical and triploblastic.

43. Which of these animals has a highly developed brain and central nervous system?

  • A) Octopus

  • B) Earthworm

  • C) Starfish

  • D) Hydra
    ✅ Answer: A) Octopus
    Explanation: The octopus has a complex and well-developed brain, one of the most sophisticated nervous systems among invertebrates.

44. Which of the following has an open circulatory system?

  • A) Earthworm

  • B) Frog

  • C) Grasshopper

  • D) Fish
    ✅ Answer: C) Grasshopper
    Explanation: Grasshoppers, like other arthropods, have an open circulatory system where the hemolymph flows freely in the body cavity.

45. Which one of the following is not a member of the phylum Mollusca?

  • A) Snail

  • B) Oyster

  • C) Squid

  • D) Cockroach
    ✅ Answer: D) Cockroach
    Explanation: Cockroaches belong to the phylum Arthropoda, not Mollusca.

46. What is the main difference between reptiles and amphibians?

  • A) Number of limbs

  • B) Skin type

  • C) Respiration type

  • D) Heart structure
    ✅ Answer: B) Skin type
    Explanation: Amphibians have permeable skin that absorbs water, while reptiles have waterproof skin with scales.

47. How do earthworms breathe?

  • A) Lungs

  • B) Gills

  • C) Skin

  • D) Trachea
    ✅ Answer: C) Skin
    Explanation: Earthworms respire through their moist skin. Oxygen diffuses directly into their bloodstream.

48. What is the primary feature of phylum Cnidaria?

  • A) Nerve ring

  • B) Stinging cells

  • C) Segmented body

  • D) Bilateral symmetry
    ✅ Answer: B) Stinging cells
    Explanation: Cnidarians like jellyfish have stinging cells (cnidocytes) for defense and capturing prey.

49. Which of these is a defining feature of mammals?

  • A) Presence of feathers

  • B) Presence of hair

  • C) Cold-blooded

  • D) Oviparous reproduction
    ✅ Answer: B) Presence of hair
    Explanation: Mammals are characterized by having hair or fur at some point in their life cycle.

50. Which of these animals is ovoviviparous?

  • A) Shark

  • B) Lizard

  • C) Whale

  • D) Frog
    ✅ Answer: A) Shark
    Explanation: Some sharks are ovoviviparous, meaning they give birth to live young, but the eggs develop inside the mother.

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