Question

select the correct answer.
on a dive in the midnight zone, scientists see specks of light that flash on and off. what is the origin of this light?
a. photosynthesis
b. bioluminescence
c. chemosynthesis
d. thermohaline currents

Explanation:

• Photosynthesis (A): Requires sunlight. The midnight zone is deep - sea with no sunlight, so this is incorrect.
• Bioluminescence (B): Many deep - sea organisms (like anglerfish, some jellyfish) produce light through chemical reactions in their bodies. This is consistent with the description of light flashing on and off in the midnight zone.
• Chemosynthesis (C): Is a process of making food (not light) using chemical energy, usually in hydrothermal vent areas.
• Thermohaline currents (D): Are ocean currents driven by differences in temperature and salinity. They do not produce light.

Answer:

B. bioluminescence