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These protists (slime molds and water molds) are similar to fungi by concurrence---they have filamentous body structure, which is a morphological adaptation that increases exposure to the environment and allows for effective decomposition (its ecological role.) However, these protists are more similar to amoeboid protists than fungi in their cellular organization, reproduction and life cycles. The life cycle of funguslike protists is complex, giving it an adaptation to allow for survival in changing environments and transport to new food sources. Some examples of fungus-like protists are:
Myxomycota (plasmodial slime molds): Heterotrophic, which is a plasmodium (amoeboid mass) during the feeding stage in its life cycle. It eats by phagocytosis and distributes nutrients and oxygen internally by cytoplasmic streaming. After the plasmodium ceases growth, the sexual reproduction stage in the life cycle begins.
Acrasiomycota (cellular slime molds): Cells function individually and are separated by membrane in the feeding stage of the life cycle. When no more food is present they function collectively
Oomycota (water molds): These protists consist of filaments called coenocytic hyphae and have walls made of cellulose, and most are decomposers that grow on dead algae and animals.