Adaptive features of Giant land snail

Body Adaptations  ; The eyes of water-dwelling and land snails have adapted to perch on two eye stalks that can retract and extend from the snails' bodies. These eye stalks slip inside-out when retracting, protecting the snails' eyesight from predators, turf wars and the elements.

Shell Adaptations ; Snails' shells protect them from predators .

Breathing Apparatus ; Freshwater and marine snails have evolved gills, while terrestrial snails sport fully formed lungs.

Secretions  ; The slime that snails secrete (the mucus )is an adaptation that helps terrestrial snails survive out of water.

Breathing Apparatus ; Terrestrial snails sport fully formed lungs.

Explanation:

answer: - few nutrients

high pressure

low temperatures

explanation: 1. few nutrients:   open-ocean zone is located way far from the land, which is the main source of the essential nutrients.2. high pressure: pressure increases by 1 atmosphere for every 10 meters increase in depth.3. ample sunlight: a large fraction of the sunlight is reflected back to the atmosphere from the sea surface. 4. varying salinity: below the thermocline, the water is isolated from the atmosphere so the salinity remains stable over the year.5. low temperatures:   the temperature of open-ocean zone ranges from a low of -2°c to an average of 17°c

digestion

it excretes wastes