Biology / Unit 9 Bio 1989 short lesson, about 20 seconds
Protist Cell Structure and Metabolic Diversity
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The idea
Protist cells range from microscopic to enormous and multinucleate, and use every metabolic strategy: photoautotrophy, heterotrophy, and mixotrophy, switching as conditions change.
In practice
Euglena photosynthesizes in light but absorbs nutrients in darkness, a mixotroph switching strategy as its environment changes.
Where people slip
A single protist species can shift metabolic strategy within its lifetime — metabolism is not always fixed by species alone.
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