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Question

Suppose a fish is swimming upstream in total darkness. Which of the following would be most likely to help the fish sense aquatic predators that approach it from behind?

A
Its well-developed eyes
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B
Its chemoreceptors
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C
Its lateral line system
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D
Its bulbus arteriosus
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Solution

The correct option is C Its lateral line system
The lateral line system works as a sense organ in fishes It helps the fish to detect changes in the water temperature, movement, pressure, and gradients. The lateral line system can also help the fish detect the presence of an approaching predator because of its sensory functions.
So, the correct answer is 'Its lateral line system'.

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