Protists space a diverse group of eukaryotic organisms belonging come Kingdom Protista. There are couple of similarities between individual members that this Kingdom, together it contains all the standard scale that room not animals, plants, or fungi.

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Most protists space microscopic and also unicellular, though a couple of species are multicellular. Typically, protists give birth asexually, though some are capable of sexual reproduction. Part protists are heterotrophs, and also feed on various other microscopic organisms and carbon-rich products they uncover in their neighboring environment; others room photosynthetic and make their very own food utilizing chloroplasts.

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Protists may be classified as animal-like, fungus-like, or plant-like

Classification of Protists


Protists are always eukaryotic, and also all protists save on computer a nucleus and other membrane-bound organelles. Lock are frequently unicellular organisms, though a few are multicellular. Protists live in aquatic environments and may be uncovered in freshwater, saltwater, or damp floor habitats.

Besides this features, the members of Kingdom Protista have small in common with one another. Protists come in a wide selection of different forms and also may be classified together animal-like, plant-like, or fungus-like, depending upon their characteristics.

Animal-like Protists

Animal-like protists room calledprotozoa(meaning ‘first animal’). All protozoans are unicellular and heterotrophic, an interpretation they seek out food in their bordering environments. Some animal-like protists food on other, smaller microorganisms, which they engulf and digest in a procedure known asphagocytosis.Others may feed ~ above non-living, organic matter.Many protozoa have a mouthlike structurethrough which they deserve to ingest food particles, while part absorb nutrients through their cabinet membrane.


Protozoa frequently have digestive secret but, unlike other types of protists, they nothing contain chloroplasts. Animal-like protists additionally lack a cabinet wall.

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Animal-like protists are called protozoa

Examples the Animal-like Protists

There are four main varieties of animal-like protists; these are the amoeba, the flagellates, the ciliates, and the sporozoans.

Amoeboid Protozoans

Amoeba are identified by the existence of pseudopodia, or ‘false feet,’ which they use to capture bacteria and also smaller protists.

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Amoeba have actually pseudopods (AKA ‘false feet’)

Flagellated Protozoans

Flagellates haveflagella,whip, or tail-like structures which they use to propel themselves with water. Some flagellates space parasitic, while others space free-living.

Ciliated Protozoans

Ciliates are covered incilia,tiny hair-like frameworks which they usage to move around and waft food into their mouths.

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Ciliates are covered in tiny, hair-like structures

Sporozoans

Sporozoans room parasitic organisms. One famous instance isPlasmodium,the parasite known to cause malaria.

Fungus-like Protists

Fungus-like protists are well-known asmolds.Like true fungi, they space heterotrophic feeders and absorb nutrient from disc organic issue in your environment. They likewise reproduce using spores. However, they different from true mushroom in that their cell wall surfaces contain cellulose, quite than chitin.

Examples that Fungus-like Protists

The two major types of fungi-like protists room slime molds and water molds.

Slime Molds

Slime molds space often uncovered on rotting logs, wherein they feeding on decaying necessary matter. This molds are regularly unicellular but, once food is scarce, deserve to swarm with each other to type a slimy mass. These brightly colored blobs can move really slowly in their search for food and, in some cases, have the right to fuse to type one enormous, multinucleated cell.

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Slime molds can type multicellular structures

Water Molds

Water molds typically live top top the surface ar of water, or in damp floor and, favor slime molds, feed on decaying necessary matter. This group includes several tree pathogens, including the destructive potato an illness known together potato blight.

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Some fungus-like protists reason serious plant diseases

Plant-like Protists


Plant-like protists (AKAalgae) are usually photosynthetic organisms, and also most contain chloroplasts and/or chlorophyll. Algal cell usually have actually a cell wall surface which, choose the cell wall surfaces of true plants, contain cellulose. However, uneven true plants, algae lack leaves, stems, and roots. Plant-like protists might reproduce asexually or sexually.

Most algal species are unicellular, despite some type large, multicellular structures (for example,seaweeds). Plant-like protists live in aquatic environments and also most varieties are found in oceans, lakes, and also ponds.

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Plant-like protists are referred to as algae

Examples of Plant-like Protists

The 7 significant groups the algae space red algae, eco-friendly algae, brown algae, fire algae, golden-brown algae, yellow-green algae, and euglenids.

Red Algae

Red algae are generally found in dry marine settings where they often grow on flat surfaces, such together reefs. Though red algae might be unicellular, lock are commonly multicellular biology and kind a range of seaweeds.

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Red algae have the right to be multicell seaweeds

Green Algae

Green algae room the most abundant team of algae. They contain chloroplasts and cell walls and are assumed to be the evolutionary ancestors of soil plants. Environment-friendly algae might be imreparable cells or multicellular.

Brown Algae

Brown algae are commonly found in marine environments. They are multicellular biology and type a range of plant-like species. The largest known instance of brown algae is the huge kelp, which regularly grows to over 30m in length.

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Giant kelp is the largest species of naval algae

Fire Algae

Fire algae include a team of unicellular organisms dubbed thedinoflagellates.Some dinoflagellates arebioluminescentand have the right to light up the surface of the ocean with an eerie, night-time glow. When existing in huge numbers, dinoflagellates can likewise cause a phenomenon recognized as ‘red tide.’

Golden-brown Algae and also Diatoms

Golden-brown algae can be discovered in both marine and freshwater environments. This group consists of thediatoms,photosynthetic organisms with transparent cell walls made the silica. Many varieties of maritime plankton are diatoms.

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Many types of marine plankton space diatoms

Yellow-green Algae

Yellow-green algae space photosynthetic organisms that live predominantly in freshwater environments. Countless have a cell wall that does not contain cellulose (as in plants and algae) or chitin (like fungi and molds). The cell wall surface composition the yellow-green birds isalmost fully unknown.

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Euglenids

Euglena space photosynthetic birds that are uncovered in a selection of aquatic habitats. Euglenids frequently have one or much more flagella however lack a cabinet wall, and also are rather encased through a protein-rich structure called apellicle.