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Difficulty: MediumExplicit Details

Discovered in 1995 on the mouthparts of the Norway lobster (*Nephrops norvegicus*), the microscopic organism *Symbion pandora* belongs to the phylum Cycliophora. To anchor itself, the organism utilizes an adhesive disk located at its base, attaching to the lobster's sensory bristles, or setae. *Symbion pandora* does not prey on its host; instead, it consumes microscopic food debris generated when the lobster feeds. Intriguingly, its reproductive cycles are synchronized with the lobster's molting schedule. When the host sheds its exoskeleton, the organism initiates a sexual reproduction phase, producing free-swimming larvae that can quickly colonize the lobster's newly formed outer shell, thereby maintaining the association across generations.

Based on the text, what is true of *Symbion pandora*?

  1. A
    It preys directly on the Norway lobster's sensory bristles.
  2. It consumes microscopic food particles produced during the host's feeding process.Answer
  3. C
    It alters the timing of the host lobster's molting cycle to benefit its reproduction.
  4. D
    It is free-swimming throughout all stages of its life cycle.

Answer

It consumes microscopic food particles produced during the host's feeding process.
The correct answer is directly supported by the text, which states that the organism 'consumes microscopic food debris generated when the lobster feeds.' This matches the assertion that it consumes microscopic food particles produced during the host's feeding process.

Step-by-Step Solution

1
Analyze the text for explicit details regarding the behavior, feeding, and life cycle of the organism.
The text states that the organism attaches to the lobster's setae using an adhesive disk, does not prey on the host, consumes microscopic food debris when the host feeds, and has reproductive cycles synchronized with the lobster's molting schedule.
To identify which option is directly supported by the factual claims in the passage.
2
Evaluate each option against the facts identified in the text.
The option stating that it consumes microscopic food particles produced during the host's feeding process is directly supported by the sentence stating it 'consumes microscopic food debris generated when the lobster feeds.' Other options contradict the text or introduce unsupported speculations.
To determine the single correct option that requires no extra inferences.

Key Concept

Identifying explicit details in a text without making speculative inferences.
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