The Presence of Cells of the Alga Chorella Growing Within

Question

The presence of cells of the alga Chorella growing within Paramecium bursaria is an example of
A) ectosymbiosis.
B) intracellular endosymbiosis.
C) parasitism.
D) commensalism.
E) competition.

Accepted Answer

The presence of cells of the alga Chorella growing within Paramecium bursaria is an example of intracellular endosymbiosis, where one organism lives inside another and both organisms benefit. The alga provides the host with energy through photosynthesis, while the host provides a protected environment and nutrients for the alga to grow. This relationship is commonly known as symbiosis.