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

  1. In bivalves, the structure which secretes the pearl is

    1. periostracum layer

    2. prismatic layer

    3. nacreous layer

    4. nacreous gland

  2. In the adult tetrapods, the vitelline veins give rise to

    1. subintestinal vein

    2. posteriorcardinal veins

    3. hepatic veins

    4. hepatic portal vein

  3. The urinary and genital functions are performed by a common (urinogenital) duct in

    1. male amphibians

    2. male mammals

    3. female reptiles

    4. all male amniotes

  4. The smaller motor nerve which arises from the dorsal side of the brain is

    1. abducens

    2. trochlear

    3. facial

    4. glossopharyngeal

  5. There is a highly vascularized and fanshaped structure projecting in the vertical cavity of the eye of

    1. fishes

    2. birds

    3. all mammals

    4. only carnivores mammals

  6. Which one of the following statements is true?

    1. Higher the altitude we go lesser is the pressure, more the depth we go more is the pressure we encounter

    2. Higher the altitude we go higher is the pressure, more the depth we go more is the pressure we encounter

    3. Higher the altitude we go lesser is the pressure, more the depth we go lesser is the pressure we encounter

    4. Higher the altitude we go higher is the pressure, more the depth we go lesser is the pressure we encounter.

  7. Which one of the following is the correct sequential step in the complete process of a primary ecological succession?

    1. Nudation-Competition and reaction-Invasion-Stabilization

    2. Invasion-Nudation-competition and reaction-Stabilization

    3. Nudation-Invasion-Competition and reaction Stabilization

    4. Invasion-Nudation-Stabilization Competition and reaction