The exercise lists different organisms and some characteristics of these organisms.
Analyzing the exercise, we can understand that:
• A) Yes, the amoeba is a heterotrophic organism that feeds on bacteria, algae, and other protozoa;
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• B) Yes, Cyanobacteria are algae capable of carrying out the photosynthesis process;
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• C) No, Diatoms are algae that also carry out the process of photosynthesis, therefore, they do not phagocytose.
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• D) Yes, saprophytes are a type of bacteria that develop by breaking down organic matter
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• E) Yes, Chlamydomonas obtain energy from the process of photosynthesis.
Therefore, the answer is option "C".