Free Kingdom Animalia MCQs with Answers

791. Salamander belongs to which of the following class?

• A. Pisces
• B. Aves
• C. Reptiles
• D. Amphibians

Explanation: Amphibia is a class of vertebrates that includes frogs, toads, newts, and salamanders. These animals are adapted to a semi-aquatic lifestyle, as they spend part of their lives in water and part on land. Salamanders are specifically known for their ability to regenerate lost body parts, including limbs and tails.

792. Vertebrates belong to phylum chordata because:

• A. They have a vertebral column
• B. The brain is enclosed by the skull
• C. The embryos have gills
• D. All of these

Explanation: Vertebrates belong to phylum Chordata primarily because they exhibit several defining features, including a vertebral column (backbone), a brain protected by a skull, and the presence of gill structures during embryonic development. Each of these characteristics is critical for the classification of organisms within this phylum. Option A, stating they have a vertebral column, is true but incomplete on its own. Option B highlights the protective feature of the skull, which is also true but does not encompass all the defining traits. Option C mentions the embryonic gills, which is a trait present in many vertebrates, but again does not capture the full spectrum of characteristics. Therefore, Option D, 'All of these', is the correct answer as it encompasses all the essential features that classify vertebrates in the phylum Chordata.

793. Which of the following are believed to have common origin with annelids?

• A. Nematodes
• B. Arthropods
• C. Molluscs
• D. None of these

Explanation: Arthropods are believed to have a common origin with annelids. Arthropods, which include insects, spiders, crustaceans, and other joint-legged animals, belong to the phylum Arthropoda. While both arthropods and annelids are segmented animals, they are part of different phyla and have significant differences in body structure and developmental patterns.

794. Mantle in molluscs is present over which of the following regions?

• A. Head
• B. Dorsal muscular foot
• C. Dorsal visceral body
• D. Both A and B

Explanation: The correct option is C. The mantle in molluscs is a significant anatomical feature that forms a protective layer over the dorsal visceral body, which contains the internal organs. The mantle is often involved in secreting the shell in species that possess one. It is not associated with the head or the muscular foot, which are primarily involved in sensory functions and locomotion, respectively.

795. The respiratory pigment found in chordates is:

• A. Haemoglobin
• B. None
• C. Hemocyanin
• D. Hemolymph

Explanation: Haemoglobin is an oxygen carrying respiratory pigment found in chordates. It is found in the erythrocytes of these animals.

796. Which of the following is an oviparous animal?

• A. Pidgeon
• B. Elephant
• C. Sheep
• D. Humans

Explanation: Option A is correct since oviparous animals are animals that produce young using eggs that are hatched after they have been laid by the parent. Option B is incorrect since the elephant is viviparous and produces young by giving birth to it after it has been developed in the body of the parent. Option C is incorrect since the sheep are also viviparous Option D is incorrect since humans are also viviparous.

797. The shell of the egg is leathery in appearance in which of the following?:

• A. Amphibians
• B. Birds
• C. Mammals
• D. Reptiles

Explanation: Reptile eggs, including those of snakes and many turtles, are characterized by their leathery shells, which are flexible and often adhere to one another. This adaptation helps protect the eggs in a terrestrial environment. In contrast, amphibians lay eggs in water with jelly-like coverings, birds have hard shells made of calcium carbonate, and most mammals do not lay eggs at all, with the exception of monotremes like the platypus, which do have leathery eggs but are a rare subgroup. Thus, the correct answer is reptiles.

798. Which of the following animals is NOT a protostome?

• A. Earthworm
• B. Cockroach
• C. Butterfly
• D. Sting ray

Explanation: Option D is correct since stingray is a deuterostome.Option A is incorrect since the earthworm is an annelid that belongs to the protostomia series.Option B is incorrect since the cockroach is an arthropod that belongs to the protostomia series

799. The organs of locomotion in 'annelids' are which of the following?

• A. Muscles
• B. Hydrostatic skeleton
• C. Parapodia
• D. Setae
• E. A,C and D

Explanation: All annelids except leeches also have chitonous hair-like structures, called setae, projecting from their cuticle. Sometimes the setae are located on paddle-like appendages called parapodia. This helps in their locomotion. they also move with muscles too

800. Which of the following exhibits both radial and bilateral symmetry?

• A. Mollusca
• B. Echinoderms
• C. Flatworms
• D. Sponges

Explanation: Echinoderms exhibit both radial and bilateral symmetry. During larval stages, echinoderms have bilateral symmetry whereas they have penta-radial or simply, radial symmetry during adult life. Molluscs and flatworms are phyla of bilateral symmetry. Sponges don't exhibit any symmetry; they are irregular/asymmetrical.