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Animal Kingdom ...

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  • Question 1
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    Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion : An anti-coagulant hirudin is present in salivary glands of leech.

    Reason : It leads to blood clotting while the leech is feeding.

  • Question 2
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    Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion : Birds are oviparous.

    Reason : Oviparous animals give birth to young ones of their own kind.

  • Question 3
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    Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion : All chordates are vertebrates.

    Reason : They possess hollow vertebral column that protects nerve cord or spinal nerves.

  • Question 4
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    Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion : Annelids like Nereis can easily swim in water.

    Reason : An adult Nereis develops fins.

  • Question 5
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    Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion : Frogs are poikilotherms .

    Reason : They can withstand cold weather and high temperature.

  • Question 6
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    Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion : Cnidarians, Ctenophorans, and Echinodermates show radial symmetry.

    Reason : Their body can be divided into two equal halves by cutting it in any plane passing through the central axis.

  • Question 7
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    Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion : Fishes belonging to class Osteichthyes have to swim constantly.

    Reason : Air bladder is absent in these fishes.

  • Question 8
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    Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion : Whale is a mammal.

    Reason : They respire with the help of lungs only.

  • Question 9
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    Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion : The fishes belonging to class Chondrichthyes must swim constantly.

    Reason : They possess four pairs of gills which are covered by an operculum on each side.

  • Question 10
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    Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion : Excretory organs are absent in phylum Platyhelminthes.

    Reason : Flame cells are the respiratory organs of Platyhelminthes.

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