Protists are primarily unicellular organisms that are not plants, fungus or animals, and are classified based on how they obtain their nutrition, and whether or not they are able to move. Animal and fungus-like protists are heterotrophs, which means that they do not make their own food and must obtain it from outside sources. Plant-like protists, such as algae, are autotrophs, which indicates that they produce their own food.Know More
Animal-like protists include protozoans, which are classified according to if they move by flagella, pseudopodia or cilia. An example of a protozoan would be zooflagellates, which use one or two flagella to move. Some types of algae are protists. They are members of the protista family that act like plants, although some algae are true plants. Fungus-like protists include slime mold, and are decomposers that have an external digestion process.
Many protists reproduce asexually using binary fission. Others reproduce sexually in a process called conjugation. Most protists have specialized body parts that allow them to move, eat and digest food, remove excess water and reproduce. Some have a soft, flexible outer membrane while others are rigid and retain their shape.Learn more about Molecular Biology & DNA
Plant-like protists, which are also called green algae, resemble plants in having a cell wall, chlorophyll and the ability to carry out photosynthesis. They are a diverse group of four phyla, but all live in water and have similar mechanisms for movement and reproduction.Full Answer >
The types of protists, which are eukaryotes, that aren't animals, fungi or plants include euglenoza, alevolates, stramenopiles, red algae, slime molds and choanoflagellates. The alevolate group includes ciliates, sporozoans and dinoflagellates. The stramenopile group includes diatoms, golden algae, green algae and water molds.Full Answer >
Three of the major characteristics used to classify organisms are cell structure, mode of nutrition and cellularity. These characteristics help scientists determine how organisms are similar to each other as well as how they are different from each other.Full Answer >
Most animals are made up of more than one cell, have cells that group into tissue, reproduce sexually, are capable of movement and ingest other organisms to obtain energy. There are exceptions to many of these characteristics, however.Full Answer >