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Healthy individuals of Paramecium bursaria contain photosynthetic algal endosymbionts of the genus Chlorella. In addition, P. bursaria also ingests bacteria.
Which term most accurately describes the nutritional mode of healthy P. bursaria?
A) photoautotroph
B) photoheterotroph
C) chemoautotroph
D) mixotroph

Question

Quizplus · Accepted Answer

P. bursaria is considered a mixotroph because it obtains nutrients through photosynthesis via its symbiotic relationship with Chlorella (making it partly autotrophic) and by ingesting bacteria (making it heterotrophic).

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