NEET BIOLOGY

Detailed explanation-1: -The major types of organisms found in aquatic environments are determined by the salinity of the water. Salinity means the amounts of salts dissolved in a volume of water. That is why aquatic life zones are divided up between saltwater life zones and freshwater life zones.

Detailed explanation-2: -the types of organisms in an aquatic ecosystem are mainly determined by the water’s salinity-the amount of dissolved salts the water contains. As a result, aquatic ecosystems are divided into freshwater ecosystems and marine ecosystems.

Detailed explanation-3: -Aquatic organisms generally fall into three broad groups: plankton, nekton, and benthos. They vary in how they move and where they live. Plankton are tiny aquatic organisms that cannot move on their own.

Detailed explanation-4: -In aquatic systems, the key factors determining the types and numbers of organisms are temperature, dissolved oxygen, sunlight availability, and nutrient availability. 1. Photosynthesis is largely limited to the upper layers, or photic zone, which can be diminished by turbidity.