Competitive Exams: Zoology MCQs (Practice-Test 21 of 112)

  1. Echinoderms are considered to be the most evolved invertebrates because they

    1. are enterocoelic

    2. are schizocoelic

    3. show resemblance with chordates in their embryonic development

    4. have a great power of regeneration

  2. Match list I with list II and select the correct answer:

    List-I (Animals) List-II (Class/order)
    1. Sea hare

    2. Sea pansy

    3. Sea lily

    4. Sand Dollar

    1. Gastropoda

    2. Alcyonaria

    3. Crinoidea

    4. Echinoidea

    • A
    • B
    • C
    • D
      • 4
      • 2
      • 3
      • 1
      • 1
      • 3
      • 2
      • 4
      • 4
      • 3
      • 2
      • 1
      • 1
      • 2
      • 3
      • 4
  3. Which one of the following pairs is not correctly matched?

      • Hydra
      • Tentaculata
      • Sea Anemone
      • Anthozoa
      • Beroe
      • Nuda
      • Jellyfish
      • Scyphozoa
  4. Which of the following metazoan phyla are grouper under the Radiata?

    1. Mollusca & Echinodermata

    2. Arthropoda & Porifera

    3. Coelenterata & Ctenophora

    4. Mollusca & Coelenterata

  5. Which one of the following is a fresh water sponge?

    1. Spongilla

    2. Scypha

    3. Pheronema

    4. Oscarella

  6. In which one of the following the very much smaller male sex lives inside the body of its female?

    1. Dracunculus

    2. Argonauta

    3. Bonellia

    4. Sacculina

  7. The totipoten cells of sponges are the

    1. amoebocytes

    2. scleroblasts

    3. archeocytes

    4. chromocytes

  8. In Monocystis, when a trophozoite changes into the gametocyte, pairing of pairing of gametocytes, gametocytes occur to form gametes. In this organism is known as

    1. syngamy

    2. syzygy

    3. gametogony

    4. gamontogamy

  9. Match List I with List II and select the correct answer:

    List-I (Larval forms) List-II (Corresponding adults)
    1. Tornaria

    2. Brachiolaria

    3. Tadpole

    4. Trochophore

    1. Starfish

    2. Jellyfish

    3. Herdmania

    4. Nereis

    5. Balanoglossus

    • A
    • B
    • C
    • D
      • 5
      • 1
      • 3
      • 4
      • 3
      • 2
      • 4
      • 5
      • 5
      • 2
      • 3
      • 4
      • 3
      • 1
      • 4
      • 5
  10. Fossil hominids of the genus Australopithecus have been recovered mainly from

    1. Southern arid eastern Africa

    2. Southern Australia

    3. Siwalik hills of northern India

    4. Regions close to Beijing In China

  11. Four different types of liporoteins are present in human plasma. The correct order of lipoproteins according to their increasing density is

    1. VLDL Chylomicrons, LDL, HDL

    2. Chylomicrons, VLDL, LDL. HDL

    3. VLDL, LDL, Chylomicrons, HDL

    4. VLDL, LDL, HDL Chylomicrons

  12. Which one pair out of the following represents one and the same thing?

    1. Atrio-ventricular node (AVN) -Pacemaker

    2. Corpus luteum-Yellow spot

    3. Factor X (Stuart Factor) -Thromboplastin

    4. Mitral valve-Tricuspid valve

  13. During fertilization of frog egg, cortical reaction occurs

    1. before the penetration of sperm

    2. at the time of contact of sperm with egg

    3. soon after the penetration of sperm

    4. after the fusion of the two nuclei

  14. During retrogessive metamorphosis of the ascidian tad pole, which one of the following does NOT regress?

    1. Caudal myotomes

    2. Gill slits

    3. Nerve cord

    4. Notochord

  15. In the fate map of early gastrula of frog, what is the correct sequence in which the three consecutive presumptive embryonic cell masses line up on the axis lying perpendicular to the dorsal lip, counting from the same?

    1. Epidermis medullary plate, notochord

    2. Prechordal plate, notochord, mesoderm

    3. Prechordal plate, notochord, medullary plate