Skip to content
MedExams

Animal Kingdom

22 NEET-UG practice questions on Animal Kingdom, part of Zoology. The first 22 are below; the first 5 with answers and explanations (tap Show answer after you have chosen), the rest in Learn with a free account.

  1. Question 1 · Hard

    Consider these statements on chordate classes: A. Both reptiles and birds show internal fertilisation and direct development. B. Cartilaginous fishes have gill slits covered by an operculum. C. The amphibian heart has two auricles and one ventricle. D. Both birds and mammals are homoiothermous. Choose the correct answer.

    1. AA, B and D only
    2. BB, C and D only
    3. CA and C only
    4. DA, C and D only
    Show answer

    Answer: D · A, C and D only

    A, C and D match NCERT. B is false: gill slits of cartilaginous fishes are separate and have no operculum; bony fishes have the operculum.

    • A: B is false, and C is true.
    • B: B is false, and A is true.
    • C: D is also true, since birds and mammals are warm-blooded.

    Remember this

    Operculum is present in bony fishes and absent in cartilaginous fishes.

  2. Question 2 · Medium

    Which animal does NOT have an open circulatory system?

    1. APila
    2. BNereis
    3. CApis
    4. DBalanoglossus
    Show answer

    Answer: B · Nereis

    Annelids such as Nereis have a closed circulatory system, with blood kept inside vessels. Molluscs, arthropods and hemichordates have the open type.

    • A: Pila is a mollusc, and its circulation is open.
    • C: Apis is an arthropod, and its circulation is open.
    • D: Balanoglossus is a hemichordate, and its circulation is open.

    Remember this

    Closed circulation occurs in annelids and chordates; open circulation occurs in arthropods, molluscs and hemichordates.

  3. Question 3 · Medium

    Given below are two statements: Statement I: All reptiles have a three-chambered heart. Statement II: Snakes and lizards shed their scales as a skin cast. Choose the correct answer.

    1. AStatement I is correct but Statement II is incorrect
    2. BStatement I is incorrect but Statement II is correct
    3. CBoth Statement I and Statement II are incorrect
    4. DBoth Statement I and Statement II are correct
    Show answer

    Answer: B · Statement I is incorrect but Statement II is correct

    Statement I fails because crocodiles have a four-chambered heart. Statement II is true as stated in NCERT.

    • A: The truth values here are the reverse of the facts.
    • C: Statement II is true of snakes and lizards.
    • D: Statement I ignores the four-chambered crocodile heart.

    Remember this

    Reptilian heart is usually three-chambered, but four-chambered in crocodiles.

  4. Question 4 · Easy

    Called a living fossil, this marine arthropod is

    1. ALocusta
    2. BAnopheles
    3. CLaccifer
    4. DLimulus
    Show answer

    Answer: D · Limulus

    Limulus, the king crab, is the arthropod named as a living fossil in NCERT.

    • A: Locusta is a gregarious pest.
    • B: Anopheles is a vector of disease.
    • C: Laccifer is the lac insect of economic use.

    Remember this

    Limulus is the living fossil; Locusta a gregarious pest; Laccifer the lac insect; Anopheles a disease vector.

  5. Question 5 · Easy

    Bilateral symmetry is shown by

    1. AAdamsia
    2. BSpongilla
    3. CDugesia
    4. DPleurobrachia
    Show answer

    Answer: C · Dugesia

    Dugesia is a flatworm, and flatworms are bilaterally symmetrical. Coelenterates and ctenophores are radial, and sponges are mostly asymmetrical.

    • A: Adamsia is a coelenterate and is radially symmetrical.
    • B: Spongilla is a sponge and is mostly asymmetrical.
    • D: Pleurobrachia is a ctenophore and is radially symmetrical.

    Remember this

    Radial forms are coelenterates, ctenophores and adult echinoderms; sponges are mostly asymmetrical.

  6. Question 6 · Medium

    In some animals, mesoderm lies as scattered pouches between ectoderm and endoderm, so the body cavity is not lined by mesoderm. Such a cavity occurs in

    1. AAncylostoma
    2. BAsterias
    3. CNereis
    4. DTaenia

    Answer and explanation in LearnFree account

  7. Question 7 · Easy

    In which animals are the body cells arranged only as loose cell aggregates, showing the cellular level of organisation?

    1. ASponges
    2. BRoundworms
    3. CFlatworms
    4. DCoelenterates

    Answer and explanation in LearnFree account

  9. Question 9 · Medium

    Match List-I with List-II. List-I (animal) A. Laccifer B. Locusta C. Pinctada D. Aedes List-II (importance) I. Pearl oyster II. Vector of disease III. Lac insect IV. Gregarious pest

    1. AA-IV, B-III, C-I, D-II
    2. BA-I, B-IV, C-III, D-II
    3. CA-III, B-IV, C-II, D-I
    4. DA-III, B-IV, C-I, D-II

    Answer and explanation in LearnFree account

  10. Question 10 · Medium

    A fish must keep swimming constantly to avoid sinking. Which option names such a fish with the correct reason?

    1. ACarcharodon, because it has no air bladder
    2. BCarcharodon, because its skeleton is bony
    3. CHippocampus, because its gills have no operculum
    4. DCatla, because it has no air bladder

    Answer and explanation in LearnFree account

  11. Question 11 · Hard

    Match List-I with List-II. List-I (animal) A. Ascidia B. Branchiostoma C. Petromyzon D. Scoliodon List-II (feature) I. Notochord from head to tail, kept throughout life, no vertebral column II. Jaws present, cartilaginous endoskeleton, placoid scales III. Notochord only in the larval tail IV. No jaws, with cartilaginous cranium and vertebral column

    1. AA-III, B-I, C-IV, D-II
    2. BA-III, B-I, C-II, D-IV
    3. CA-III, B-IV, C-I, D-II
    4. DA-I, B-III, C-IV, D-II

    Answer and explanation in LearnFree account

  13. Question 13 · Easy

    Eight external rows of ciliated comb plates, used for locomotion, are seen in

    1. APleurobrachia
    2. BAurelia
    3. CAdamsia
    4. DPhysalia

    Answer and explanation in LearnFree account

  14. Question 14 · Medium

    Which combination of external features identifies a cyclostome?

    1. ACircular sucking mouth without jaws, no scales, no paired fins
    2. BVentral mouth with strong jaws, placoid scales, paired fins
    3. CTerminal mouth with jaws, cycloid scales, paired fins
    4. DCircular sucking mouth without jaws, placoid scales, paired fins

    Answer and explanation in LearnFree account

  15. Question 15 · Medium

    Given below are two statements: Statement I: In Obelia, polyps produce medusae asexually and medusae form polyps sexually. Statement II: The medusa of coelenterates is the sessile, cylindrical body form. Choose the correct answer.

    1. ABoth Statement I and Statement II are incorrect
    2. BBoth Statement I and Statement II are correct
    3. CStatement I is incorrect but Statement II is correct
    4. DStatement I is correct but Statement II is incorrect

    Answer and explanation in LearnFree account

  16. Question 16 · Medium

    Match List-I with List-II. List-I (structure) A. Parapodia B. Radula C. Stomochord D. Cnidoblasts List-II (phylum) I. Coelenterata II. Annelida III. Hemichordata IV. Mollusca

    1. AA-IV, B-II, C-III, D-I
    2. BA-II, B-IV, C-I, D-III
    3. CA-II, B-IV, C-III, D-I
    4. DA-III, B-IV, C-II, D-I

    Answer and explanation in LearnFree account

  17. Question 17 · Medium

    Assertion A: The adult echinoderm is radially symmetrical. Reason R: Echinoderms have a water vascular system that helps in locomotion and in the capture and transport of food. Choose the correct answer.

    1. ABoth A and R are correct and R is the correct explanation of A
    2. BA is not correct but R is correct
    3. CBoth A and R are correct but R is not the correct explanation of A
    4. DA is correct but R is not correct

    Answer and explanation in LearnFree account

  18. Question 18 · Medium

    Match List-I with List-II. List-I (animal) A. Pteropus B. Exocoetus C. Betta D. Hippocampus List-II (common name) I. Flying fish II. Flying fox III. Fighting fish IV. Sea horse

    1. AA-II, B-I, C-III, D-IV
    2. BA-II, B-III, C-I, D-IV
    3. CA-II, B-I, C-IV, D-III
    4. DA-I, B-II, C-III, D-IV

    Answer and explanation in LearnFree account

  19. Question 19 · Hard

    Given below are two statements: Statement I: Hemichordates have a closed circulatory system and excrete through nephridia. Statement II: Cephalochordates keep their notochord only in the larval tail. Choose the correct answer.

    1. AStatement I is correct but Statement II is incorrect
    2. BBoth Statement I and Statement II are incorrect
    3. CStatement I is incorrect but Statement II is correct
    4. DBoth Statement I and Statement II are correct

    Answer and explanation in LearnFree account

  20. Question 20 · Medium

    Arrange the animals from the simplest to the most complex level of body organisation. A. Hirudinaria B. Sycon C. Dugesia D. Aurelia

    1. AB, C, D, A
    2. BD, B, C, A
    3. CB, D, A, C
    4. DB, D, C, A

    Answer and explanation in LearnFree account

  21. Question 21 · Medium

    Compared with a chordate, a non-chordate that possesses a heart and a nerve cord will have

    1. Aa ventral heart and a dorsal, hollow, single nerve cord
    2. Ba dorsal heart and a ventral, solid, double nerve cord
    3. Ca ventral heart and a ventral, solid, double nerve cord
    4. Da dorsal heart and a dorsal, solid, single nerve cord

    Answer and explanation in LearnFree account

  22. Question 22 · Hard

    Read these statements about non-chordates: A. Ctenophores reproduce only by sexual means, with external fertilisation. B. Sponges show internal fertilisation and direct development. C. In roundworms the sexes are separate and females are often longer than males. D. Leeches are dioecious, like Nereis. Which of these are correct?

    1. AC and D only
    2. BA and C only
    3. CA, B and C only
    4. DA and D only

    Answer and explanation in LearnFree account

More Zoology questions

Answer them one by one, keep your score and see your weak topics in Learn. Signed-out visitors try 25 per exam; sign in with Google to see them all.

Study Zoology