Question

Write the habitat, outermost layer of cell, flagella and nutrition status of euglenoids. ​

Answer 1

Explanation:

Euglena viridis (Gr., eu = true; glene = eye-ball or eye-pupil; L., viridis = green) is a common, solitary and free living freshwater flagellate. It is found in freshwater pools, ponds, ditches and slowly running streams. It is found in abundance where there is considerable amount of vegetation.

Answer 2

Habitat:-
Euglena, especially Euglena gracilis, is the most studied member of the Euglenaceae. Euglena live in fresh and brackish water habitats such as ponds rich in organic matter. Some species can form green or red “blooms” in ponds or lakes.

Outermost layer of cell:-
Euglena are characterized by an elongated cell (15–500 micrometres [1 micrometre = 10−6 metre], or 0.0006–0.02 inch) with one nucleus, numerous chlorophyll-containing chloroplasts (cell organelles that are the site of photosynthesis), a contractile vacuole (organelle that regulates the cytoplasm), an eyespot, and one or two flagella. Certain species (e.g., E. rubra) appear red in sunlight because they contain a large amount of carotenoid pigments.

Flagella:-
A flagella is a long, whip-like structure that helps some single celled organisms move. It is composed of microtubules. They help propel cells and organisms in a whip-like motion. The flagellum of eukaryotes usually moves with an “S” motion, and is surrounded by cell membrane.

Nutrition status of euglenoids:-
Their mode of nutrition is mixotrophic as they have the characters of both autotrophs and heterotrophs. The nutrition is accomplished by either holophytic or saprophytic. Holophytic mode of nutrition is seen in those organism that obtain energy and mineral by photosynthesis


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