Use the Following Information and Figure to Answer the Question

question 75

Multiple Choice

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

Percent of sea slug respiratory carbon demand provided by indwelling dinoflagellates.
If we assume that carbon is the sole nutrient needed by sea slugs to drive their cellular respiration, then based on the graph, during which season(s) is it least necessary for P. ianthina to act as a chemoheterotroph?

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

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Definitions:

Private Ballot

A voting method that ensures the voter's choices are secret, safeguarding the privacy of the voter's decisions.

Informational Social Influence

A psychological phenomenon where individuals conform to the attitudes, behaviors, or beliefs of a group under the assumption that the group possesses more knowledge about the situation.

Normative Social Influence

The effect others have on an individual, causing them to adapt their behaviors to gain acceptance and approval.

Deindividuation

The loss of self-awareness and self-restraint occurring in group situations that foster arousal and anonymity.