Competitive Exams: Zoology MCQs (Practice-Test 48 of 112)

  1. At the culmination of retrogressive metamorphosis in Asddians, the only salient chordate feature left unaffected is:

    1. notochord

    2. branchial clefts

    3. nerve cord

    4. post-anal tail

  2. The reptiles with the skull that has postfrontal and supratemporal below; and panetal above are classified as subclass

    1. Anapsida

    2. Diapsida

    3. Parapsida

    4. Synapsida

  3. Match List-I (Organism) with List-II (Characteristics) and select the correct answer using the code given below the lists:

    List-I List-II
    1. Heptanchus

    2. Heteropneustes

    3. Astrape

    4. Echeneis

    1. Electric organs

    2. Air breathing organs

    3. Most primitive shark

    4. First dorsal fin modified as adhesive disc

    • A
    • B
    • C
    • D
      • 3
      • 1
      • 2
      • 4
      • 3
      • 2
      • 1
      • 4
      • 4
      • 1
      • 2
      • 3
      • 4
      • 2
      • 1
      • 3
  4. Consider the following statements

    1. An important characteristic of Amphioxus is that its notochord extends from the tip of the rostrum to the end of the tail.

    2. The body wall of Amphioxus has a thick cuticle covering, an epidermis made up of multilayered columnar epithelial cells.

    Which of the statements given above is/are correct?

    1. 1 only

    2. 2 only

    3. Both 1 and 2

    4. Neither 1 nor 2

  5. Which one of the following is an evidence to show that the birds evolved from reptiles?

    1. Scales of birds and reptiles are shed and replaced

    2. Bones of some reptiles are pneumatic like birds

    3. Presence of pygostyle in reptiles

    4. Presence of synapsid skull and the oviparous nature

  6. Which one of the following animals is surrounded by an external covering that is leathery, translucent, test tunic composed of tunicin with a clear matrix in which are embedded cells of various shapes, calcareous spicules and branching vascular vessels ending in bulb like vascular ampullae?

    1. Sycon

    2. Balanaglossus

    3. Herdmania

    4. Euspongia

  7. Consider the following statements:

    1. In Monocystis, all gametes are alike (isogametes) whereas in Plasmodium, the gametes are dissimilar (anisogametes).

    2. In Monocystis, the zygotes are motile whereas in Plasmadium, the zygotes are non-motile.

    Which of the statements given above is/are correct?

    1. 1 only

    2. 2 only

    3. Both 1 and 2

    4. Neither 1 nor 2

  8. The infective stage of Entamoeb hictolytica is

    1. trophozoite stage

    2. precystic stage

    3. binucleate cystic stage

    4. tetranucleate cystic stage

  9. Consider the following statements:

    1. The medusae of Obelia are dioecious.

    2. In Obelia, medusoid phase represents a true haploid sexual generation.

    3. Parent medusae die soon after liberating the gametes.

    Which of the statements given above are correct?

    1. 1 and 2 only

    2. 2 and 3 only

    3. 1 and 3 only

    4. 1, 2 and 3

  10. The organ of Pila that helps to taste the chemical and physical qualities of incurrent water and also to assist in the selection of food is called

    1. Cibarium

    2. Sahvanum

    3. Osphradium

    4. Germarium

  11. Consider the following statements:

    1. In Pheretima, there is a distinct dermis below the epidermis whereas in Hirudinaria, there is no distinct dermis.

    2. In Pheretima, the pharynx and buccal cavity are separate whereas in

    Hirudinaria, they are not separate.

    Which of the statements given above is/are correct?

    1. 1 only

    2. 2 only

    3. Both 1 and 2

    4. Neither 1 nor 2

  12. The type of palate found in pigeon's skull is

    1. Dromaeognathous

    2. Schizognathous

    3. Aegithognathous

    4. Desmognathous

  13. Consider the following statements:

    1. In Palaemon, hepatopancreas absorbs digested food material.

    2. In the blood vascular system of

    Palaemon, there are no veins and capillaries.

    Which of the statements given above is/are correct?

    1. 1 only

    2. 2 only

    3. Both 1 and 2

    4. Neither 1 nor 2

  14. In which one of the following is duodenum a U-shaped tube and receives two ducts from liver and three ducts from pancreas?

    1. Oryctolagus

    2. Scoliodon

    3. Rana

    4. Columba

  15. The ‘Tornaria’ larva of Balanoglossus is equipped with ciliated bands and may be considered to be identical to

    1. planula larva of Cnidaria

    2. bipinnaria larva of Echinodermata

    3. cercaria larva of helminths

    4. ammocoetes larva of Petromyzon