I am a unicellular organism. I am shapeless but I do have a well-defined nucleus. Who am I?
A
Amoeba
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B
Cyanobacteria
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C
Chlamydomonas
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D
E. coli
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Solution
The correct option is AAmoeba Amoeba is a unicellular eukaryotic organism. It does not have a definite shape but has a defined nucleus. Amoeba moves around by making extensions known as pseudopodia.