The Next Few Questions Refer to the Following Description

question 13

Multiple Choice

The next few questions refer to the following description.
Healthy individuals of Paramecium 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 gathers 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.
-Which term most accurately describes the nutritional mode of healthy P. bursaria?

• A) photoautotroph
• B) photoheterotroph
• C) chemoheterotroph
• D) chemoautotroph
• E) mixotroph

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Definitions:

Blood Type AB

A human blood group characterized by the presence of both A and B antigens on the surface of red cells, making it the universal recipient type in blood transfusion.

Possible Father

Refers to a male individual who may be the biological father of a child, pending genetic testing or legal determination.

Blood Type O

A blood group in the ABO system characterized by the absence of both A and B antigens on red cells and the presence of anti-A and anti-B antibodies in the plasma.

Dominant Characteristics

Traits that are expressed in an organism even when only one copy of the gene responsible is present.