CORAL REEFS

  • 4 (1)

Tuesday 12 April 2011

                                          PHYLUM-PROTOZOA

                                          Characters

Microscopic, simplest & protoplasmic grade of organization

Unicellular with one or more nuclei

Solitary or form loose colonies

Body symmetry none

Body naked or pellicle bound
Body form constant but may vary

Single cell performs all functions

Locomotion by pseudopodia, cilia or flagella

Nutrition holozoic, holophytic, saprozoic, parasitic

Respiration through general body surface or contractile vacuoles

Reproduction asexual by fission or budding and sexual by conjugation or syngamy

Alternation of generation present

Encystment present

50,000 species

Free living, aquatic, fresh water, parasitic or commensal

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