Diadromous fish migrate between freshwater and marine biomes during their life cycle. The migration’s obligate nature is why diadromous fish can be ____ those that are merely euryhaline (able to tolerate high salinity): the euryhaline blackchin tilapia can survive high salinity, but its life cycle does not involve relocation to a different biome, as does that of the diadromous wild salmon.
Which choice completes the text with the most logical and precise word or phrase?
Explanation
Context: Diadromous fish migrate between freshwater and marine biomes during their life cycle. This "obligate nature" is why they can be [blank] "those that are merely euryhaline"—distinguished from them.
Answer: A) demarcated from
Why? Distinguished from = separated from. Demarcated from = separated from.
Traps:
- B) reconstituted as → means reformed, different
- C) derived from → means originated, different
- D) conflated with → means confused with, opposite