Multiple Choice Questions

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chloragogen cells help in 

  • respiration

  • reproduction

  • circulation

  • nutrition


D.

nutrition

Chloragogen cells or yellow cells are present in the region of intestine in Pheretima. The exact function of these cells is not fully known but it is believed that they are concerned with storage of reserve food and also excretory in function. Chloragogen cells are analogous to liver of vertebrates.


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Chloragogen cells of earthworms are analogous to vertebrate

  • lungs

  • liver

  • gut

  • kidneys


'Sea fan' belongs to

  • Coelenterata

  • Porifera

  • Echinodermata

  • Mollusca


In contrast to annelids the platyhelminthes show

  • radial symmetry

  • presence of pseudocoel

  • bilateral symmetry

  • absence of body cavity


Which of the following character is present essentialy in chordates 

  • Ventral spinal chord

  • Dorsal heart

  •  Pharyngeal gill slits

  • Blood flow in forward direction in ventral blood vessels


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Number of cranial nerves in frog

  • 10 pairs 

  •  9 pairs 

  • 12 pairs 

  • none of these


Food storage in Leucosolenia occur by

  • ostia

  • osculum

  • thesocyte

  • spongocoel


Mantle, foot and shell are the characteristics of

  • Nautilus

  • Echinus

  • Limulus

  • Euplectella


Trochophore is the larva of

  • Neopilina

  • Chiton

  • Pila

  • All of these


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Class Crustacea differs from lnsecta in having

  • two pairs of antennae

  • jointed foot

  • chitinous cuticle

  • none of the above


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