CSIR NET JRF: Zoology MCQs (Practice-Test 106 of 112)

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1. Spermiogenesis is the transformation of

   1. spermatogonium into primary spermatocyte

   2. spermatogonium into functional spermatozoa

   3. primary spermatocytes into secondary spermatocytes

   4. spermatids into spermatozoa

2. In amphibia, the female specific protein vitellogenin is synthesised by

   1. oocyte

   2. uterus

   3. liver

   4. spleen

3. Match List I with List II and select the correct answer

   List-I (Developmental processes)	List-II (Animal)
   Parthenogenesis Retogressive metamorphosis Paedogenesis Blastokinesis	Urochordates Honeybee Lepidopteran insect Amphibia

   • A
   • B
   • C
   • D
   1. • 2
      • 1
      • 4
      • 3
   2. • 2
      • 3
      • 4
      • 1
   3. • 1
      • 2
      • 3
      • 4
   4. • 4
      • 3
      • 2
      • 1

4. During the development of the frog, which one of the following sets of structures is derived from the endoderm?

   1. Skin and skin glands

   2. Pituitary and adrenal medulla

   3. Trachea, lungs, liver and pancreas

   4. Kidneys and their ducts

5. Match List I with List II and select the correct answer

   List-I (Structures)	List-II (Origin)
   Retina Nephric tubules Pigment pattern of skin Allarnois	Endodernal cells Ectodermal cells Neural crest cells Mesodermal cells

   • A
   • B
   • C
   • D
   1. • 1
      • 2
      • 3
      • 4
   2. • 4
      • 3
      • 2
      • 1
   3. • 2
      • 4
      • 3
      • 1
   4. • 3
      • 4
      • 1
      • 2

6. The nucleus of Pander is a component of

   1. frog's egg

   2. mammalian egg

   3. hen's egg

   4. reptilian egg

7. The correct sequence of appearance of the given structures during the development of CNS in any vertebrate is

   1. neural groove, neural plate, neural tube

   2. neural plate, netural groove, neural tube

   3. neural plate, neural tube, neural groove

   4. neural groove, neural tube, neural plate

8. In Amphioxus, the coelom is formed by

   1. splitting of the lateral mesoderm

   2. development of an additional mesodermal layer from the somatic mesoderm

   3. spreading of the dorsal mesodermal somites

   4. the fonnation of mesodennal pouches from the dorsolateral walls of the archenteron

9. Somatopleure is a double layered tissue consisting of

   1. somatic mesoderm and endoderm

   2. somatic mesoderm and ectoderm

   3. splanchnic mesoderm and endoderm

   4. somatic mesoderm and splanchnic mesoderm

10. The mesoderm in chick embryo gives rise to all of the following organs except the

    1. heart

    2. kidney

    3. brain

    4. skeleton

11. During cleavage, the cell division is very rapid. The daughter cells do not undergo any growth and the cells thus become gradually smaller in volume. Hence

    1. there is no growth in the volume of the embryo

    2. the embryo grows in volume

    3. the embryo becomes smaller in volume

    4. the embryo remains static

12. The Mullerian duct in the female amniotes develops into

    1. ureter

    2. oviduct

    3. uterus

    4. seminal receptacle

13. Which of the following pairs are correctly matched?

    1. • Amnion
       • Vascularised fotal membrane
    2. • Chorion
       • Somatopleure in origin
    3. • Allantois
       • Organ of respiration

    Codes:

    1. 1, 2 and 3

    2. 1 and 2

    3. 1 and 3

    4. 2 and 3

14. Match List I with List II and select the correct answer

    List-I	List-II
    Bat, insect, bird Porpoise, flying lemur, man Survival and vigorous multiplication of some bacteria when exposed to streptomycin	Natural selection Divergent evolution Spontaneous gene mutation Convergent evolution

    • A
    • B
    • C
    1. • 1
       • 2
       • 3
    2. • 4
       • 1
       • 2
    3. • 3
       • 4
       • 1
    4. • 4
       • 2
       • 1

15. The evolution from as ingle ancestral species to a variety of forms that occupy different habitats is

    1. adaptive radiation

    2. discontinuous distribution

    3. continuous distribution

    4. adaptive convergence