Use the Information and Figure to Answer the Following Question

question 81

Multiple Choice

Use the information and figure to answer the following question.
The sea slug Pteraeolidia ianthina can harbor living dinoflagellates (photosynthetic protists) in its skin. These endosymbiotic dinoflagellates reproduce quickly enough to maintain their populations. Low populations do not affect the sea slugs very much, but high populations (> 5 × 10⁵ cells/mg of sea slug protein) can promote sea slug survival.

Percent of sea slug respiratory carbon demand provided by indwelling dinoflagellates.
According to the graph, during which season(s) of the year is the relationship between the sea slug and its dinoflagellates closest to being commensal?

• A) winter
• B) spring
• C) summer
• D) spring and summer

---

Definitions:

Community Development

A process where community members come together to take collective action and generate solutions to common problems.

Theory Y

A management concept that assumes employees are self-motivated, seek responsibility, and are creative problem solvers.

Incapable of Growth

A state or condition where an organism, individual, or entity cannot physically or developmentally expand or progress.

Family Preservation

Efforts and services aimed at keeping families together, preventing the unnecessary placement of children in foster care, group homes, or other institutional settings.