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MMLU / African lungfish often live in small, stagnant, freshwater pools. With reduced…

Problem

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question

African lungfish often live in small, stagnant, freshwater pools. With reduced gills, they differ from other fish in that they breathe air. They also differ in that they release the nitrogen waste urea instead of ammonia. Which of the following statements correctly explains how this is an advantage for lungfish?

choices

  1. Urea is insoluble in water and sinks to the bottom of the small pools. Thus the poisonous substance is isolated from the fish.
  2. Ammonia, which is highly toxic, would endanger lungfish that inhabit the small pools.
  3. Other fish in the small pools can use urea as an energy source.
  4. The highly toxic urea makes the pool uninhabitable to competitors.

subject

high_school_biology

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Source and history

task_id
184e57a3-5caa-5e3a-ad94-ac9c60d591cb
task_key
all--test--184e57a3-5caa-5e3a-ad94-ac9c60d591cb
task_revision_id
1
config / split
all / test

Official source

initial import