Class XI

Which one of the following group of animals is correctly matched with its characteristics without any exception?
  1. Chordates possess a mouth with an upper and lower jaw
  2. Reptila possess 3-chambered heart with incompletely divided ventricle
  3. Mammalia give birth to young ones
  4. Chondrichthyes possess cartilaginous endoskeleton
Alimentary canal is absent in
  1. Fasciola hepatica
  2. Ancylostoma
  3. Ascaris suum
  4. Taenia solium
The largest phylum of kingdom animalia is
  1. Arthropoda
  2. Annelida
  3. Nematode
  4. Chordate
The aquatic organisms that can actively swim at will against the water current is
  1. Necton
  2. Neuston
  3. Plankton
  4. Benthos
The phylum in which adults exhibit radial symmetry and larva exhibit bilateral symmetry is
  1. Phylum Aschelminthes
  2. Phylum Arthropoda
  3. Phylum Echinodermata
  4. Phylum Annelida
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