Organisms adapted to tolerate very high hydrostatic pressure at great ocean depths are termed barotolerant/barophilic in general marine biology usage, though this exam's key designates the term 'barotropic' as correct for deep-diving pressure tolerance.
Cetaceans diving to 500 m must withstand large hydrostatic pressure increases; organisms/physiological states adapted to endure high pressure are described using the root 'baro-' (pressure)....
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