Is the common amoeba a predator that feeds on other protozoa and unicellular algae?

The answer is yes.

The common amoeba is a unique unicellular species, since it has a wide range of adaptations to environmental conditions. Provided that there is no access to sunlight, it behaves like a predator, consuming other protozoa or unicellular algae. Under favorable conditions, the amoeba behaves like an autotroph and synthesizes organic matter with the help of chloroplast, which is in its body.

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