Question

while researching a topic, a student has taken the following notes:

• the barreleye fish (macropinna microstoma) lives in the \twilight zone\ of the ocean, where some light still penetrates.
• it has highly sensitive, tubular eyes that are shielded by a fluid - filled transparent dome on its head.
• these eyes are adapted to look upward to detect the silhouettes of prey against the faint sunlight.
• the tripod fish (bathypterois grallator) lives in the \abyssal zone,\ where there is no sunlight at all.
• it is nearly blind and relies on three extremely long, specialized fins to \stand\ on the muddy seafloor.
• the tripod fish uses these fins to sense vibrations from tiny crustaceans drifting in the current.

the student wants to contrast the sensory adaptations of the barreleye fish and the tripod fish. which choice most effectively uses relevant information from the notes to accomplish this goal?
a while the barreleye fish has highly sensitive tubular eyes protected by a dome, the tripod fish is nearly blind and lives in the abyssal zone.
b the barreleye fish uses upward - facing eyes to see prey in the twilight zone, whereas the tripod fish uses specialized fins to sense vibrations in the sunless abyssal zone.
c both the barreleye fish and the tripod fish have developed unique physical features to survive in the deep ocean environment.
d the tripod fish stands on long fins to catch crustaceans, unlike the barreleye fish, which detects silhouettes against faint sunlight.

Explanation:

To contrast sensory adaptations, we analyze each option:

• Option A: Mentions the tripod fish's habitat but not its sensory adaptation (uses fins for vibration sensing, not just living in abyssal zone), so incomplete contrast.
• Option B: Clearly states the barreleye's eye - based adaptation (upward - facing eyes to see prey in twilight zone) and the tripod's fin - based adaptation (sense vibrations in abyssal zone), effectively contrasting their sensory adaptations.
• Option C: Discusses unique physical features for survival, not specifically sensory adaptations contrast.
• Option D: Focuses on how they catch prey (behavior) rather than sensory adaptations.

Answer:

B. The barreleye fish uses upward - facing eyes to see prey in the twilight zone, whereas the tripod fish uses specialized fins to sense vibrations in the sunless abyssal zone.