question_answer 63)

  Classify the following organisms based on the absence/presence of true coelom, (i.e., acoelomate, pseudocoelomate and coelomate)

Spongilla Wauchereia Scorpion

Sea anemone Ascaris Birds

Planaria Nereis Fishes,

Liver fluke Earthworm Horse

 

Answer:

  Coelom is the main body cavity in most multicellular animals and it contains digestive tract and other organs. Organisms in which coelom is absent are Spongilla, sea-anemone, Planaria and liver fluke, hence are, called acoelomates. Pseudocoelomates are animals without true coelom e.g., Wauchreria bancroni. Animals in Vi/hich coelom is present are, Ascaris (Aschelminthes), Nereis (Annelida), earthworm (Annelida), scorpion (Arthropoda), birds (Aves), fishes (Pisces) and horse (Mammalia).