Question

what is the main difference in respiration between land and aquatic organisms

Answer 1

The terrestrial animals actually respire through the lungs and on the other hand aquatic organisms respire via gills. The land animals do not invest more energy where the aquatic organisms require spending more energy.

Answer 2

Land animals respire through lungs .They take in atmospheric oxygen.Respiration is faster.
Aquatic animals respire mainly by gills.Take in oxygen dissolved in water.Respiration is comparatively slower.....