Competitive Exams: Zoology MCQs (Practice-Test 51 of 112)

  1. Which, one of the following is a characteristic of adult ascidian?

    1. Elongated tail

    2. Large notochord

    3. Enlarged pharynx

    4. Well developed statocyst

  2. Match List I with List II and select the correct answer using the code given below the lists:

    List-I (Type of placenta) List-II (Mammalian examples)
    1. Diffuse

    2. Cotyledonary

    3. Zonary

    4. Discoidal

    1. Cats

    2. bats

    3. Deer

    4. House

    • A
    • B
    • C
    • D
      • 4
      • 3
      • 1
      • 2
      • 2
      • 1
      • 3
      • 4
      • 4
      • 1
      • 3
      • 2
      • 2
      • 3
      • 1
      • 4
  3. Hensen's knof is present in which one of the following?

    1. Blastula of frog

    2. Gastrula of frog

    3. Blastula of chick

    4. Gastrula of chick

  4. Liver, pancreas, thymus and thyroid are formed from which one of the following?

    1. Ectoderm

    2. Mesoderm

    3. Endoderm

    4. Trophoblast

  5. Consider the following:

    1. Thyroid

    2. Calcium

    3. Iodine

    Which of the above are the most important factors playing pivotal role in progressive metamorphosis of anura?

    1. 1, 2 and 3

    2. 1 and 2 only

    3. 2 and 3 only

    4. 1 and 3 only

  6. Which one of the following groups of animals have vitelline membrane?

    1. Amphibians

    2. Fishes

    3. Tunicates

    4. Mammals

  7. In which of the following groups of arthropoda, do the body divisions include cephalothorax and abdomen?

    1. Crustacea only

    2. Crustacea and Arachnida only

    3. Crustacea, Arachnida and Onychophora only

    4. Crustacea, Arachnida, Onychophora and Chilopoda

  8. Consider the following pairs: Insects: Type of mouth parts

      • Orthoptera
      • Sucking type
      • Coleoptera
      • Biting and chewing type
      • Lepidoptera
      • Siphoning type
      • Hemiptera
      • Piercing and sucking type

    Which of the above pairs are correctly matched?

    1. 1, 2 and 3

    2. 1, 3 and 4

    3. 1 and 4 only

    4. 2, 3 and 4

  9. Which one of the following types of pseudopodia is found in Actinophrys?

    1. Lobopodium

    2. Filopodium

    3. Rhizopodium

    4. Axopodium

  10. During breeding season, an arm on the left side of male cuttlefish (Cephalopoda: Mollusca) undergoes modification that helps in copulation. This modification is termed as

    1. Tagmatization

    2. Hectocotylization

    3. Cephalisation

    4. Strobilatton

  11. Consider the following characteristics of an animal:

    1. Body covering consists of a thin, membranous and transparent cuticle.

    2. An extensive perivisceral coelom is absent.

    3. Digestive system includes a long alimentary canal and digestive glands.

    4. Parapodia and setae are absent.

    The above staged characteristics are true in case of which one of the following?

    1. Pheretima posthuma

    2. Hirudinaria granulosa

    3. Nereisdumerilii

    4. Lumbricus viridis

  12. With reference to Balanoglossus, consider the following statement:

    1. It belongs to Enteropneusta.

    2. It has sense organs on the proboscis.

    3. Its gonads develop from coelomic wall.

    Which of the statements given above is/are correct?

    1. 1 only

    2. 2 and 3 only

    3. 1 and 3 only

    4. 1, 2 and 3

  13. The hydatid disease in humans is caused by which one of the following?

    1. Cystic stage of Taenia solium

    2. Cystic stage of Fasciola hepatica

    3. Cystic stage of Echinococcus granulosus

    4. Adult stage of Dipylidium caninum

  14. With reference to nucleic acid, consider the following statements:

    1. When ribose lacks one oxygen atom on the 3' carbon, it is called deoxyribose.

    2. The difference between thymine and uracil is that thymine has a methyl group CH3 instead of hydrogen, at 5'C position.

    3. In cytosine, the amino group NH2 is present at the number 6 position and in adenine it is present at the number 4 position.

    Which of the statements given above is/are correct?

    1. 1, 2 and 3

    2. 2 only

    3. 1 and 3 only

    4. 3 only

  15. The type of gene regulation governing the lactose operon of E. Coli that involves the lac I gene product is best described as:

    1. Positive, inducible

    2. Negative, repressive

    3. Feed-back inhibition

    4. Negative, inducible