Multiple Choice Questions

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Which of the following is a correct match

  • Frog - External ears

  • Earthworm - Muscular gizzard, typhlosole

  • Human - Fat globule, 10 pairs of cranial nerves

  • Cockroach - Chilopoda


B.

Earthworm - Muscular gizzard, typhlosole

Frogs do not have external ears. Instead, they have an eardrum of sorts, called a tympanum, which is just behind each eye.

Typhlosole are internal folds of the intestine or intestinal inner wall. Typhlosole occurs in bivalve mollusks, lampreys and some annelids and echinoderms. The gizzard, also referred to as the ventriculus, gastric mill, and gigerium, is an organ found in the digestive tract of some animals, including birds, reptiles, earthworms and some fish. This specialized organ constructed of thick, muscular walls is used for grinding up food; often rocks are instrumental in this process. In certain insects and mollusks, the gizzard features chitinous plates or teeth.

Humans have 12 pairs of cranial nerves. Cockroach belongs to class insecta of phylum arthropoda.


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What is common between earthworm and Periplaneta

  • Both have red coloured blood

  • Both possess anal styles

  • Both have malpighian tubules

  • Both have segmented body


Which of the following have porous body and are diploblastic?

  • Aurelia and Obelia

  • Adamsia and Euplectella

  • Leucosolenia and Spongilla

  • Sycon and Hydra


Which of the following statements is correct

  • Aspergillus niger is used for producing cyclosporin A.

  • Activated sludge is digested by aerobic bacteria to produce marsh gas.

  • Fleming, Chain & Florey were awarded with Nobel Prize for discovering penicillin. 

  • BOD is amount of oxygen produced by bacteria on decomposition.


Kingdom Animalia is characterised by

  • direct dependence on autotrophs

  • indirect dependence on autotrophs

  • absence of chlorophyll

  • absence of cell wall.


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In the given table, some organisms are classified into categories. However, there is one exception. Select the option with correctly mentioned exceptional organism.

  • Organisms Category Exception
    Penicillium, Aspergillus, Mucor Fungi Mucor
  • Organisms Category Fungi
    Cacti, Venus flytrap Plants Cacti
  • Organisms Category Exception
    Ascaris, Nereis, Wuchereria Aschelminthes Nereis
  • Organisms Category Exception
    Scorpion, Prawn, Anopheles Arthropoda Prawn

Assertion: Frog can change its colour, according to its surroundings.

Reason: It is a way of mimicry to capture preys

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false


Which of the following is a homopolysaccharide

  • Heparin

  • Inulin

  • Pectin

  • Hyaluronic acid


Assertion: Complexity of classification increases from kingdom to species.

Reason: Common characters increase from kingdom to species.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false


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Pebrine in silkworms is caused by

  • Dugesia

  • Monocystis

  • Nosema

  • Plasmodium


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