What signs prove a more complex organization of ciliates-shoes in comparison with Proteus amoeba and green euglena.
Proteus is a genus of bacteria, amoeba and euglena green are representatives of unicellular animals.
The complex structure of the ciliates is proved by:
the presence of two nuclei (bacteria do not have it, amoeba and euglena have one nucleus each);
the presence of two contractile vacuoles (in bacteria it is generally absent, in amoeba and euglena one each);
complex structure of contractile vacuoles (the presence of directional tubules to the vacuole);
the presence of several types of digestive vacuoles (phased digestion of one type of food);
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