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NEET Exam  >  NEET Test  >  NCERT Based Tests  >  Assertion & Reason Test: Animal Kingdom - NEET MCQ

Animal Kingdom - Free Assertion & Reason Questions with Solutions NEET


MCQ Practice Test & Solutions: Assertion & Reason Test: Animal Kingdom (10 Questions)

You can prepare effectively for NEET NCERT Based Tests for NEET with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Assertion & Reason Test: Animal Kingdom". These 10 questions have been designed by the experts with the latest curriculum of NEET 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 20 minutes
  • - Number of Questions: 10

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Assertion & Reason Test: Animal Kingdom - Question 1
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Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion : Birds are oviparous.

Reason : Oviparous animals give birth to young ones of their own kind.

Detailed Solution: Question 1

Oviparous are animals which lay eggs. e.g., Reptiles, birds, etc.

Assertion & Reason Test: Animal Kingdom - Question 2
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Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion : All chordates are vertebrates.

Reason : They possess hollow vertebral column that protects nerve cord or spinal nerves.

Detailed Solution: Question 2

All chordates are not vertebrates: Vertebrates have vertebral column but protochordates and agnatha have notochord that is not replaced by vertebral column.

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Assertion & Reason Test: Animal Kingdom - Question 3
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Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion : Cnidarians, Ctenophorans, and Echinodermates show radial symmetry.

Reason : Their body can be divided into two equal halves by cutting it in any plane passing through the central axis.

Detailed Solution: Question 3

Cnidarians, ctenophorans, and echinodermates show radial symmetry because their body can be divided into two equal halves by cutting it in any plane passing through the central axis.

Assertion & Reason Test: Animal Kingdom - Question 4
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Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion : Fishes belonging to class Osteichthyes have to swim constantly.

Reason : Air bladder is absent in these fishes.

Detailed Solution: Question 4

Fishes belonging to class Chondrichthyes have to swim constantly. It is because air bladder is absent in these fishes therefore, they have to swim constantly to avoid sinking.

Assertion & Reason Test: Animal Kingdom - Question 5
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Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion : Whale is a mammal.

Reason : They respire with the help of lungs only.

Detailed Solution: Question 5

Whale is a mammal. The hairs on its body are lost due to aquatic adaptation. They respire with the help of lungs only.

Assertion & Reason Test: Animal Kingdom - Question 6
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Assertion (A): Echinoderms exhibit bilateral symmetry during their larval stages.

Reason (R): Bilateral symmetry is advantageous for sessile organisms.

Detailed Solution: Question 6

Echinoderms, such as starfish and sea urchins, indeed exhibit bilateral symmetry during their larval stages but transition to radial symmetry as adults. The reason provided, however, is not correct in this context. Bilateral symmetry is typically associated with mobility and a directed movement, which is beneficial for the larval stages that need to disperse. Sessile organisms, which do not move, often exhibit forms of symmetry that are not necessarily bilateral, as seen in adult echinoderms.

Assertion & Reason Test: Animal Kingdom - Question 7
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Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion : The fishes belonging to class Chondrichthyes must swim constantly.

Reason : They possess four pairs of gills which are covered by an operculum on each side.

Detailed Solution: Question 7

The fish belonging to class Chondrichthyes have to swim constantly because air bladder is absent in these fishes therefore, they have to swim constantly to avoid sinking. In these fish, gill slits are separate and not covered by operculum.

Assertion & Reason Test: Animal Kingdom - Question 8
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Assertion (A): Nematodes are pseudocoelomates.

Reason (R): Pseudocoelomates have a body cavity that is not fully lined with mesoderm.

Detailed Solution: Question 8

Nematodes, or roundworms, are indeed classified as pseudocoelomates because they possess a body cavity, known as a pseudocoel, which is not completely lined by tissue derived from mesoderm. The reason accurately explains what distinguishes pseudocoelomates from true coelomates, where the latter have a body cavity fully lined with mesoderm. This distinction is important for understanding the evolutionary relationships and functional anatomy of different animal groups.

Assertion & Reason Test: Animal Kingdom - Question 9
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Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

Assertion : Excretory organs are absent in phylum Platyhelminthes.

Reason : Flame cells are the excretory organs of Platyhelminthes.

Detailed Solution: Question 9

Flame cells are the excretory organs of Platyhelminthes and other related animals which possess flickering cilia or flagella for driving the excretory products.

Assertion & Reason Test: Animal Kingdom - Question 10
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Assertion (A): Molluscs have a radula for feeding.

Reason (R): The radula is a unique structure that allows molluscs to drill into their food sources.

Detailed Solution: Question 10

Molluscs are indeed known for having a radula, a toothed, chitinous ribbon, which they use for feeding. It acts like a file, scraping or cutting food before ingestion. While the reason correctly describes one function of the radula, it does not encompass all its uses across different mollusc species. The radula's primary function is more general; it is used for feeding, but not all molluscs use it to drill into food sources. Some use it to scrape algae off surfaces, while others may use it in different ways.

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About this NEET Practice Test

This test contains 10 MCQs on Assertion & Reason Test: Animal Kingdom with detailed solutions for each question. It is part of the NCERT Based Tests for NEET course on EduRev, designed to align with the current NEET syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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