Describe two life zones in the ocean and how organisms are affected by the conditions in each zone.

There are two main life zones in the ocean. The first one is the coastal zone - the zone near the coast. In this zone, tides expose some part of the see bottom for some part of each day, so some of the organisms in this part can live both under the water and dried out for hours. Also, this part of ocean characterize higher temperature and higher amount of nutrient-rich matter that supports life. Therefore the 90% of all sea lives in the coastal zone. The second zone is the open sea which include the rest of the ocean away from the land. It can be divided in two parts: neretic zone, in which sunlight penetrates the whole water column and oceanic zone, which is characterized by darkness and very high pressure. 

Photosynthesis. . .