Biology Test Biology Marine Biology & Aquatic Ecosystems 2

Question 1

Hydrothermal vent communities obtain their energy primarily through:

Accepted Answer

Chemosynthesis by bacteria oxidizing hydrogen sulfide

Answer

Sunlight via photosynthesis

Answer

Organic debris sinking from the surface

Answer

Radioactive decay

Question 2

Which adaptation allows deep-sea fish to withstand extreme pressure?

Accepted Answer

High concentrations of trimethylamine oxide (TMAO) stabilizing proteins

Answer

Rigid, thick bones

Answer

Absence of any internal fluids

Answer

Air-filled swim bladders

Question 3

The term 'benthic zone' refers to the:

Accepted Answer

Bottom sediment and floor of aquatic ecosystems

Answer

Open water column far from shore

Answer

Surface microlayer of the ocean

Answer

Sunlit upper ocean layer

Question 4

Which process drives major ocean surface currents?

Accepted Answer

Wind patterns interacting with the Coriolis effect

Answer

Lunar gravitational pull alone

Answer

Temperature differences between the poles and equator only

Answer

Tidal friction

Question 5

Bioluminescence in marine organisms is most commonly used for:

Accepted Answer

Predator attraction, prey luring, and communication

Answer

Photosynthesis in deep water

Answer

Thermoregulation

Answer

Oxygen production

Question 6

Upwelling zones along continental coasts are among the world's most productive fisheries because upwelling brings:

Accepted Answer

Nutrient-rich cold water from the deep ocean to the surface

Answer

Warm water that speeds metabolism

Answer

Oxygenated surface water downward

Answer

Freshwater from glacial melt