Question

........................... is an autotrophic protozoan
a] Paramoecium
b] Amoeba
c] Spirogyra
d] Euglena
If you are sure about your answer then only you have answer it otherwise not.
Those who will give me correct answer I will mark you as Brainleast

Answer 1

Explanation:

Protozoan are mostly unicellular eukaryotes and only one of them is mesotrophic that is an organism showing both autotrophic and heterotrophic mode of nutrition.

Euglena is also known as autotrophic protozoan for the above reason. It shows both autotrophic and heterotrophic mode of nutrition. Rest Paramaecium and Amoeba are heterotrophic protozoans. Spirogyra belongs to Thallophyta in Plantae kingdom. Hence, our correct answer is:

$\Large{\cdot{ \underline{ \boxed{ \purple{ \bf{Euglena \: (d)}}}}}}$

And we are done !!

Answer 2

Required Answer:

☆Euglena..

Extra Info:

Euglena:

Euglena, genus of more than 1,000 species of single-celled flagellated (i.e., having a whiplike appendage) microorganisms that feature both plant and animal characteristics. Found worldwide, Euglena live in fresh and brackish water rich in organic matter and can also be found in moist soils. As photosynthetic protists, Euglena have a taxonomy that is somewhat contentious, and the genus is often placed either in the phylum Euglenozoa or the algal phylum Euglenophyta.

Structure of Euglena:

• A small free living and freshwater form.

• Body spindle shaped and usually green in colour and is surrounded with tough & elastic membrane – the pellicle.

• In the middle of anterior end lies a cytostome leading into a small cytopharynx which dialates behind into a reservoir.

• Near the reservoir a large contractile vacuole is present.

• Ectoplasm full of myonemes and endoplasm has a small rounded nucleus and conspicuous chloroplasts arranged like a star.

• A long flagellum originates from two roots on the side of reservoir.

• A tiny eye spot is also present near the roots of flagellum.

• Reserve food in the form of pyrenoid bodies.

• Nutrition holophytic asometimes saprophytic also.

• Reproduction through longitudinal binary fission, but in adverse circumstances through encystment and palmella stage.

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