“Animal Kingdom” MCQ with Answer Explanation : NEET 2025.

Here below some basic MCQ’s of animal kingdom with answer which is explained in details. Let’s check one by one.

Question 1:
Which of the following phyla is characterized by the presence of a notochord, a dorsal hollow nerve cord, and pharyngeal slits at some stage of development?

A) Arthropoda
B) Chordata
C) Mollusca
D) Annelida

Answer: B) Chordata

Explanation: Chordates are characterized by having a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail at some stage in their development. This is a defining feature of the phylum.

Question 2:
Which class of animals is primarily characterized by the presence of feathers?

A) Mammalia
B) Reptilia
C) Aves
D) Amphibia

Answer: C) Aves

Explanation: Aves, or birds, are the only class of animals that possess feathers, which are essential for flight, insulation, and display.

Question 3:
Which of the following is NOT a characteristic of mammals?

A) Mammary glands
B) Hair or fur
C) Cold-blooded
D) Three middle ear bones

Answer: C) Cold-blooded

Explanation: Mammals are warm-blooded (endothermic) and possess mammary glands, hair or fur, and three middle ear bones, distinguishing them from cold-blooded animals.

Question 4:
What type of symmetry is exhibited by organisms in the phylum Cnidaria?

A) Bilateral symmetry
B) Radial symmetry
C) Asymmetry
D) Pentaradial symmetry

Answer: B) Radial symmetry

Explanation: Cnidarians, such as jellyfish and corals, exhibit radial symmetry, allowing them to be divided into similar halves around a central axis.

Question 5:
Which group of animals is primarily characterized by having a tough outer exoskeleton made of chitin?

A) Echinodermata
B) Arthropoda
C) Mollusca
D) Porifera

Answer: B) Arthropoda

Explanation: Arthropods, which include insects, arachnids, and crustaceans, have an exoskeleton made of chitin, providing support and protection.

Question 6:
In which of the following groups is external fertilization most commonly observed?

A) Mammals
B) Birds
C) Amphibians
D) Reptiles

Answer: C) Amphibians

Explanation: Amphibians typically exhibit external fertilization, especially during their breeding season in aquatic environments, where eggs and sperm are released into the water.

Question 7:
Which type of circulatory system is found in vertebrates?

A) Open circulatory system
B) Closed circulatory system
C) Both A and B
D) None of the above

Answer: B) Closed circulatory system

Explanation: Vertebrates have a closed circulatory system where blood is contained within vessels, allowing for efficient transport of nutrients, gases, and wastes.

Question 8:
Which of the following is a characteristic feature of echinoderms?

A) Jointed legs
B) Spiny skin
C) Exoskeleton
D) Gills

Answer: B) Spiny skin

Explanation: Echinoderms, such as starfish and sea urchins, are known for their spiny skin, which is a defining feature of the phylum.

Question 9:
Which type of animal is characterized by a segmented body and a coelom?

A) Cnidaria
B) Mollusca
C) Annelida
D) Porifera

Answer: C) Annelida

Explanation: Annelids, such as earthworms and leeches, have a segmented body and possess a true coelom, which allows for greater complexity in body structure.

Question 10:
What is the primary mode of nutrition in sponges?

A) Autotrophic
B) Heterotrophic
C) Saprotrophic
D) Photosynthetic

Answer: B) Heterotrophic

Explanation: Sponges are heterotrophic organisms that filter feed on small particles in the water, using specialized cells called choanocytes.