- Water is the medium in which most processes of life occur.
(a) Distinguish between the physical properties of water and air. [2]
The ringed seal (Pusa hispida) can be found in the Arctic and sub-Arctic regions of the Pacific, Atlantic and Arctic Oceans.
(b) Describe two physical adaptations of the ringed seal to live in water. [2]
Ringed seals belong to more than one trophic level as they feed on zooplankton and fish. They are secondary consumers when they feed on zooplankton.
(c) State the trophic level of zooplankton. [1]