Use the Information and Figure to Answer the Following Question

question 68

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

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Definitions:

Conditioned Response

A learned response to a previously neutral stimulus, resulting from its association with an unconditioned stimulus.

Cognitive Therapy

A form of psychotherapy that focuses on changing negative thought patterns to improve emotions and behaviors.

Aaron Beck

A psychiatrist known as one of the founders of cognitive therapy, Beck developed influential psychological models of depression and proposed the cognitive triad of negative thought patterns.

Negative Thoughts

Cognitive processes characterized by pessimism, criticism, or despair, which can impact emotional well-being and mental health.