Class XI

An egg laying animal grouped under mammals is
  1. Fluke
  2. Duck-billed Platypus
  3. Kangaroo
  4. Horn-bill
Air bladder is absent in
  1. Trygon
  2. Exocoetus
  3. Labeo
  4. Clarias
Which among the following is called Portuguese man-of-war?
  1. Meandrina
  2. Adamsia
  3. Physalia
  4. Gorgonia
Which phylum has water vascular system as a characteristic feature?
  1. Phylum Coelenterata
  2. Phylum Echinodermata
  3. Phylum Ctenophora
  4. Phylum Coelenterata
The larvae of urochordates is called
  1. Larvalone
  2. Sticky rays
  3. Ammocoete
  4. Tadpole
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