Question

With respect to the given image identify i and ii respectively.

• A. i-intertidal zone , ii-pelagic zone
• B. i-photic zone , ii-aphotic zone
• C. i-freshwater zone , ii- marine water zone
• D. None of these

Answer 1

The correct option is B i-photic zone , ii-aphotic zone

The marine ecosystem is a diverse and massive biome that sustains life in the expansive oceans of earth. It is divided further into intertidal zone and pelagic zone. The intertidal zone is the shallow region of the ocean where the water meets the shore. The pelagic zone is open ocean of any unspecified depth. In the pelagic zone, light plays a major role because it is essential for the survival of the photosynthesizers. Therefore, the pelagic zone is further subdivided into the photic and aphotic zone. The photic zone is the region that has adequate light penetration which is about 100 meters deep. It is at this region, photosynthesis takes place actively and rigorously. This is also called as the open water zone. The region below 100 meters is the aphotic zone. As the name suggests, it is the zone where there is minimal or no penetration of light. This dark zone is also called deep water zone.