PROTOZOA. 



Grade A. PROTOZOA (Plastldozoa). 



Unicellular organisms. The cell-body (sarcode, protoplasm) effects the 

 reception and assimilation of food ; the endoplast or nucleus (chromatin 

 and nucleolus ; nuclear fluid) plays an important part in reproduc- 

 tion. One or more contractile vacuoles frequently present. Keproduction 

 effected by fission, gemmation, or spore-formation (often after preceding 

 conjugation or copulation). 



All Protozoans live in water, damp places, or as parasites in the juices 

 of other animals. 



