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Difficulty: MediumBiomes and Aquatic/Terrestrial Habitats

During a marine ecology survey, research scientists record organisms possessing heavy calcareous shells, strong muscular foot attachment mechanisms, and flexible holdfasts capable of enduring wave turbulence and periodic atmospheric exposure during low tide. Which marine aquatic zone do these organisms inhabit?

  1. Intertidal (littoral) zoneAnswer
  2. B
    Oceanic (pelagic) zone
  3. C
    Abyssal (benthic) zone
  4. D
    Neritic zone

Answer

The intertidal (littoral) zone is the correct habitat because its organisms must withstand physical wave action and periodic exposure to air at low tide.
Organisms residing in the intertidal (littoral) zone experience alternating periods of immersion in seawater and exposure to air as tides rise and fall. Morphological features such as heavy shells, muscular foot anchorage, and holdfasts protect against desiccation and prevent organisms from being swept away by pounding waves.

Step-by-Step Solution

1
Analyze the environmental stresses described in the stem.
Identified wave turbulence and fluctuating atmospheric exposure during low tide.
Adaptations like heavy shells, muscular feet, and holdfasts prevent dislodgement by waves and desiccation when uncovered by water.
2
Match the environmental profile to the appropriate marine habitat zone.
The zone between maximum high tide and minimum low tide marks is defined as the intertidal (littoral) zone.
Only the intertidal zone undergoes cyclical submersion and air exposure caused by tidal tides.

Key Concept

Zonation and adaptive features in aquatic biomes and marine habitats
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Topics

Biomes and Aquatic/Terrestrial Habitats

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