Question

Which of these zones belong to the photic zone of a freshwater ecosystem?

• A. Littoral and profundal​
• B. Limnetic and littoral​
• C. Profundal and limnetic
• D. Bathyal and abyssal​

Answer 1

The correct option is B Limnetic and littoral​

• The freshwater ecosystem is broadly divided into three zones based on light penetration.
• The littoral zone, also known as the shallow zone is the area near the shore.
• The littoral zone is followed by the limnetic zone that receives ample light from the sun.
• Both, limnetic and littoral zone constitute the photic zone of a freshwater ecosystem.
• Next to the limnetic zone, is the profundal zone which is very cold and dimly lit.
• Photosynthetic activity is absent.
• Bathyal and ​abyssal​ zones are zones of the marine water ecosystem.