Euglena | Study of Protozoa with characteristics, classification and examples

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In this video, we are going to learn about protozoan animals belonging to Genera Euglena.
Euglena is a genus of unicellular eukaryotes with flagella.
These are the best-known and most widely studied organisms,
and this diverse group contains about 54 genera and at least 200 species.

Species of Euglena are found in freshwater and saltwater.
They are often abundant in stagnant waters, where they may bloom in numbers sufficient and color the surface of ponds and ditches green or red. Most Euglena species are autotrophs with photosynthesizing chloroplasts within the cell body, enabling them to feed by autotrophy, like plants, as long as they are in the light but saprophytic in complete darkness,
where they utilize organic nutrients in solution.
Euglena chloroplasts contain pyrenoids,
used in synthesizing paramylon, a form of starch energy storage that enables them to survive periods of light deficiency. The existence of pyrenoids is used as an identification marker of the genus, separating it from other euglenoids. Euglena gracilis has been used widely in the laboratory as a model organism.
Further, we will look into the Scientific classification of Euglena.
Euglena belongs to the domain Eukaryota because a nucleus is present in the cell body. Further in classification, it belongs to
Phylum: Euglenozoa
Class: Euglenoidea
Order: Euglenida
Family: Euglenaceae
Genus: Euglena
Euglenids are the best-known unicellular flagellate organisms.
Now we will see the distinctive features of organisms belonging to the genus euglena.
They have a Spindle-shaped body with rounded anterior and pointed posterior ends.
Two flagella are present, one or both emerging by two roots inside the cytopharynx.
Stigma, contractile vacuole, and chromatophores are present in the body.
Stigma is usually in the anterior and the nucleus in the posterior part.
We can observe stored food-material as Paramylum and pyrenoids.
And these unicellular animals reproduce asexually through binary fission.

The following videos will teach about the Museum Study of Protozoan unicellular animals, Paramecium, Amoeba, and Plasmodium.
0:00 Introduction and general characters of Euglena
1:13 Classification of Euglena
1:40 Distinctive features of organisms


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