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 Multiple Choice QuestionsMultiple Choice Questions


Assertion : Salamander, Sphenodon are classified as amphibians.

Reason : Sphenodon is regarded as living fossil.

  • If both Assertion and Reason are true and Reason is the correct explantion of Assertion

  • If both Assertion and Reason are true and Reason is not the correct explanation of Assertion

  • If Assertion is true but Reason is false

  • If Assertion is false but Reason is true


Hydra receives impulses and stimuli through

  • nerve net

  • nematocytes

  • sensory cells

  • flame cells


The red colour of 'red sea' is due to which of the following blue-green algae?

  • Chlamydomonas nivalis

  • Anabaena

  • Microcystis

  • Trichodesmium


Identify the correct statement

  • In amniotes last nerve is spinal accessory

  • In non- amniotes last nerve is vagus.

  • Optic is shortest nerve

  • Olfactory nerves has mixed fibres.


Class Crustacea has following features :

  • Cephalothorax, book lungs, chitinous exoskeleton

  • Head and thorax, biramous appendages, book lungs

  • Head and thorax, book lungs, chitinous exoskeleton

  • Cephalothorax, biramous appendages, gills


Which of the following Phyla are included in Enterozoa?

  • Annelida, Mollusca, Porifera

  • Echinodermata, Hemichordata, Porifera

  • Mollusca, Arthropoda, Hemichordata

  • Porifera, Mollusca, Arthropoda


A definite number of segments are found in

  • slug

  • earthworm

  • leech

  • tapeworm


The sites of the first, second and third moulting of the Ascaris larva are respectively

  • soil, lung and intestine

  • liver, stomach and intestine

  • soil, alveoli and alveoli

  • soil, intestine and lung


Which of the following is correct about nematocyst?

  • It can be re-used.

  • It is excretory organ in arthropods.

  • It is ejected on contact and pierce the prey.

  • None of these.


Ambulacral grooves are absent in the living forms of the Class

  • Crinoidea

  • Asteroidea

  • Ophiuroidea

  • Echinodermata