Multiple Choice Questions

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Earthworms are

  • ureotelic when plenty of water is available

  • ureotelic when plenty of water is available

  • uricotelic under conditions of water scarcity

  • uricotelic under conditions of water scarcity


D.

uricotelic under conditions of water scarcity

Class Oligochaeta includes terrestrial earthworms and some other species that live in fresh water. Aquatic oligochaetes excrete ammonia while terrestrial oligochaetes excrete urea but Lumbricus produces both ammonia and urea.

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What is true about Nereis, Scorpion, Cockroach and Silver fish?

  • They all have jointed paired appendages

  • They all possess dorsal heart

  • None of them is aquatic 

  • None of them is aquatic 

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Six highly chitinous plate-like teeth are found in ……. of cockroach

  • Mandible

  • Gizzard

  • Mexilla

  • Rectum


Areolar connective tissue joins

  • fat body with muscles

  • integument with muscles

  • bones with muscles

  • bones with muscles

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Receptor sites for neurotransmitters are present on

  • Membranes of synaptic vesicles

  • Pre-synaptic membrane

  • Tips of axons

  • Tips of axons

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Select the correct route for the passage of sperms in male frogs :

  • Testes - Bidder's canal - Kidney - Vasa
    efferentia - Urinogenital duct - Cloaca

  • Testes - Vasa efferentia - Kidney - Seminal
    Vesicle - Urinogenital duct - Cloaca

  • Testes - Vasa efferentia - Bidder's canal -
    Ureter - Cloaca

  • Testes - Vasa efferentia - Bidder's canal -
    Ureter - Cloaca

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MALT constitutes about ___________ percent of the lymphoid tissue in human body.

  • 50%

  • 20%

  • 70%

  • 70%

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Which one of the following in birds, indicates, their reptilian ancestry?

  • Scales on their hindlimbs

  • Four-chambered heart

  • Two special chambers crop and gizzard in their digestive tract

  • Eggs with a calcareous shell


Myelin sheath is produced by

  • Schwann Cells and Oligodendrocytes

  • Astrocytes and Schwann Cells

  • Oligodendrocytes and Osteoclasts

  • Oligodendrocytes and Osteoclasts

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Which of the following pairs are correctly matched?
Animals                          Morphological features
(i) Crocodile             -       4-chambered heart
(ii) Sea urchin          -        Parapodia
(iii) Obelia                -       Thecodont
(iv) Lemur                -       Thecodont

  • A, C and D

  • B, C and D

  • Only A and D

  • Only A and D

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