Question

Main differences between Kingdom Monera and Protesta?

Answer 1

Monerans are prokaryotes. 
Protists are eukaryotes.

Monerans usually don't have appendages like cilia, flagella, or pseudopodia.
Protists usually have those appendages for locomotion.

Monerans reproduce by asexual means.
Protists reproduce by both sexual and asexual means.

Their mode and source of nutrition may also differ.