Competitive Exams: Zoology MCQs (Practice-Test 103 of 112)

  1. Consider the following statements. The function of fertilization is to

    1. facilitate the contents of the nuclei of the gametes to unite

    2. mix the paternal and maternal characters in the offspring

    3. restore the normal diploid number

      1. 1, 2 and 3 are correct

      2. 1 and 2 are correct

      3. 2 and 3 are correct

      4. 1 and 3 are correct

  2. Consider the following law/theories:

    1. Biogenetic law

    2. Theory of germplasm

    3. Theory of epigenesis

    4. Theory of preformation

    The correct chronological sequence in which these theories in developmental biology were propounded is

    1. 4, 3, 1, 2

    2. 4, 3, 2, 1

    3. 3, 4, 1, 2

    4. 3, 4, 2, 1

  3. During fertilization, the enzyme which facilitates penetration of the egg by the spermatozoan is

    1. acid phosphatase

    2. alkaline phosphatase

    3. hyaluronidase

    4. acetylcholinesterase

  4. A series of evaginations that develop from the pharynx during the development of tadpoles are called

    1. visceral pouches

    2. visceral grooves

    3. visceral arches

    4. branchial arches

  5. The ganglia of the central and sympathetic nervous system in frog develop from the

    1. neural plate cells

    2. notochordal cells

    3. neural crest cells

    4. nerve cells

  6. Blastula of Branchiostoma consists of

    1. blastoderm, blastopore and blastomeres

    2. blastocoele, blastoderm and blastopore

    3. blastocoele, blastoderm and blastomeres

    4. blastocoele, blastopore and blastomeres

  7. The animal group having radially symmetrical adult but bilaterally symmetrical larva is

    1. Porifera

    2. coelenterata

    3. Annelida

    4. Echinodermata

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

    List-I (Group of animals) List-II (Larva)
    1. Annelida

    2. Cyclostomata

    3. Echinodermata

    4. Hemichordata

    1. Ammocoetes

    2. Trochophore

    3. Tornaria

    4. Auricularia

    • A
    • B
    • C
    • D
      • 1
      • 2
      • 4
      • 3
      • 2
      • 1
      • 3
      • 4
      • 2
      • 1
      • 4
      • 3
      • 1
      • 2
      • 3
      • 4
  9. Hensen's node is formed during the gastrulation of

    1. amphibians

    2. amphibians and reptiles

    3. birds

    4. reptiles, birds and mammals

  10. During progressive development, the gill arches change into

    1. tongue

    2. tympanic membrane

    3. hyoid apparatus

    4. pharyngeal pouches

  11. Amnion and allantois are found in

    1. fish, frog and fowl

    2. fish and frog

    3. fowl and fox

    4. frog, fowl and fox

  12. In Eutheria, if the fertilized ovum is implanted in the uterine wall, then further development of the foetus cannot occur

    1. without the formation of placenta

    2. in the presence of progesterone

    3. in the presence of foetal membranes

    4. with mother's hormones

  13. The modern synthetic theory of evolution is based on

    1. genetic and chromosomal mutation

    2. genetic recombination and natural selection

    3. reproductive isolation

    4. all of the above

  14. The fact that germ cells get separated from embryonic rudiments of the soma, early in life of an organism, was demonstrated by Weismann as an evidence

    1. against inheritance of acquired characters

    2. against the role of mutations in evolution

    3. against the theory of natural selection

    4. in favour of inheritance of acquired character

  15. In a litter of six guinea pigs, one has black rough hair, two have smooth black hair, two have white rough hair and one has smooth white hair. If the mother has white smooth hair, then the genotype of the father will be

    1. homozygous with black rough hair

    2. homozygous with black smooth hair

    3. heterozygous with white smooth hair

    4. heterozyous with black rough hair