Final answer:
The most common method of asexual reproduction in protists is binary fission, which results in two genetically identical daughter cells from one parent cell.
Step-by-step explanation:
The most common method of asexual reproduction in protists is binary fission. This involves a single parent cell splitting into two identical daughter cells. Protists undergo a variety of asexual reproduction methods, which can include binary fission, multiple fission, and budding. Of these, binary fission is most common. During this process, the single-celled organism duplicates its genetic material and divides into two parts, with each new organism being genetically identical to the original. A well-known protist that exhibits binary fission is the Paramecium.