Protista are classified based on what characteristics?

i. Mode of reproduction     ii. Mode of nutrition     iii. Cell structure
 

Protists are eukaryotic single-celled organisms. Protists are highly diverse organisms with little in common. Protists are classified according to a number of factors, including their cellular structure, mode of nutrition, and mode of reproduction. Some protists have single cells, while others have multiple cells. In terms of nutrition, they can be heterotrophic, autotrophic, or mixotrophic. They can reproduce asexually or sexually.