Use the following information to answer the question.
Healthy individuals of Paramectum bursaria contain photosynthetic algal endosymbionts of the genus Chlorella. When within their hosts, the algae are referred to as zoochlorellae. In aquaria with light coming from only one side, P . bursaria gather at the well-lit side, whereas other species of Paramecium gather at the opposite side. The zoochlorellae provide their hosts with glucose and oxygen, and P . bursaria provides its zoochlorellae with protection and motility. P . bursaria can lose its zoochlorellae in two ways: (1) if kept in darkness, the algae will die; and (2) if prey items (mostly bacteria) are absent from its habitat, P . bursaria will digest its zoochlorellae.
The motility that permits P . bursaria to move toward a light source is provided by___________ (A) pseudopods (B) a single flagellum featuring the 9+2 pattern (C) many cilia (D) contractile vacuoles

In marine and brackish waters, the ciliate species Paramecium bursaria can be found. It collaborates with Zoochlorella, a type of green algae, in a mutualistic endosymbiotic interaction. While the Paramecium gives the algae movement and protection, the algae also live inside the Paramecium in its cytoplasm and feed it. P. bursaria has two contractile vacuoles, a large oral groove, one micronucleus, and one macronucleus. Its length ranges from 80 to 150 m.

P. bursaria is frequently used in biology classes as both an example of a protozoan and of symbiosis. It is the only species of Paramecium that forms symbiotic associations with algae.

To learn more about P . bursaria from the given link:

https://brainly.com/question/13539673

#SPJ4