Hint: Protists have a wide range of species. Though there are exceptions, they are usually microscopic and unicellular (made up of just one cell). Protists have well-organized cells with a nucleus and specialized cellular machinery known as organelles.
Protists are eukaryotic species that are mainly unicellular, but there are some multicellular protists (for example, kelp and seaweed). Protists include species such as protozoa, algae, and molds. Many protist species are decomposers, meaning they feed on dead organisms to meet their nutritional needs.
Protists are single-celled eukaryotes that live in pond water, but they also live in a variety of other marine and terrestrial habitats and fill a variety of niches. There are some very large multicellular organisms, such as kelps, that are not microscopic and single-celled.
There are over 100,000 known living protist organisms, and it's unknown how many more are yet to be discovered. Since many protists exist in symbiotic relationships with other organisms, and these relationships are frequently species specific, there is a tremendous potential for undescribed protist diversity to match the diversity of the hosts.
Oomycetes, chytrids, labyrinthulomycetes, molds, and other decomposer protists are examples. Oomycetes are fungus-like protists that thrive on the remains of animals. Slime molds are fungus-like protists that can be found on rotting logs and compost piles. Slime molds travel slowly in search of decaying matter, which is their food.Labyrinthulomycetes are a type of marine protist that decomposes dead plant matter. The majority of chytrid species are decomposers. Some protozoa are decomposers as well.
While most protists are mobile, different types of protists have evolved different modes of movement. Flagella are spinning or whipping structures found on certain protists. Others have rows or tufts of tiny cilia on their bodies that they beat together to swim. Others send out lobe-like pseudopodia from anywhere on the cell, anchor the pseudopodium to a substrate, and force the rest of the cell in the direction of the anchor point. By combining their locomotion technique with a light-sensing organ, some protists may shift toward light.
Yes, protists are decomposers.
Note: Protists can eat a variety of things and can be aerobic or anaerobic. The existence of chloroplasts distinguishes photosynthetic protists (photoautotrophs). Other protists are heterotrophs, meaning they feed on organic matter (such as other organisms).