Question

The eyes of the elephant seal adapt to darkness more quickly than any other animal yet tested, thus allowing it to hunt effi ciently under the gloomy conditions at its feeding depth of between 300 and 700 meters.

Answer 1

The gastrointestinal hormones namely secretin and cholecystokinin secreted by duodenal epithelium activate which organ to discharge their secretions.

Answer 2

The eyes of the elephant seal adapt to darkness more quickly than any other animal yet tested, thus allowing it to hunt efficiently under the gloomy conditions at its feeding depth of between 300 and 700 meters. A. The eyes of the elephant sea