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Difficulty: HardRhetorical Synthesis: Summarization and Generalization

While planning a presentation, a student takes the following notes:
* *Kiwa tyleri* (commonly called the "Hoff crab") is a species of squat lobster discovered in 2010.
* It lives near hydrothermal vents on the Southern Ocean floor, where water temperatures vary from 0∘C0^\circ\text{C} to over 350∘C350^\circ\text{C}.
* The crab's chest is covered in dense, hair-like structures called setae.
* Chemosynthetic, filamentous bacteria grow in large colonies on these setae.
* *Kiwa tyleri* scrapes the bacteria off its chest and consumes them as its primary source of food.

The student wants to summarize the relationship between *Kiwa tyleri* and the bacteria on its body. Which choice most effectively uses information from the given notes to accomplish this goal?

  1. *Kiwa tyleri* hosts colonies of chemosynthetic bacteria on its chest's hair-like setae and consumes these bacteria as its primary food source.Answer
  2. B
    Discovered in 2010, the squat lobster *Kiwa tyleri* lives near hydrothermal vents on the Southern Ocean floor in temperatures ranging from 0∘C0^\circ\text{C} to over 350∘C350^\circ\text{C}.
  3. C
    Many species of deep-sea squat lobsters survive in extreme geothermal environments by harvesting chemosynthetic bacteria on their bodies for food.
  4. D
    *Kiwa tyleri* grows chemosynthetic bacteria on its setae to insulate its chest against the freezing 0∘C0^\circ\text{C} water of the Southern Ocean.

Answer

The correct answer states that *Kiwa tyleri* hosts colonies of chemosynthetic bacteria on its chest's hair-like setae and consumes these bacteria as its primary food source.
The correct answer states that *Kiwa tyleri* hosts colonies of chemosynthetic bacteria on its setae and consumes them as a primary food source. This effectively summarizes the relationship by identifying the nature of their association (the crab hosting the bacteria on its body) and the ecological benefit (the crab eating them).

Step-by-Step Solution

1
Identify the student's specific rhetorical goal.
The goal is to summarize the relationship between *Kiwa tyleri* and the bacteria on its body.
The prompt explicitly asks to summarize this relationship.
2
Analyze the notes for information about this relationship.
The notes state that chemosynthetic bacteria grow on the crab's setae (hair-like chest structures) and that the crab eats these bacteria as its primary food.
We must find the correct details that describe how the two organisms interact.
3
Evaluate the choices to find the one that accurately synthesizes these points without generalizing too broadly or focusing on unrelated details.
The correct option correctly links the hosting of bacteria on the setae and their consumption as food. Other choices either ignore the bacteria, generalize to other species, or invent a function (insulation) not in the notes.
Only one option satisfies the goal of summarizing the relationship based purely on the facts provided.

Key Concept

Rhetorical Synthesis: Summarization and Generalization
Estimated Time:1m 30s
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Topics

Rhetorical Synthesis: Summarization and Generalization

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