plants do not have any specific organs for breathing .they utilise simple process of diffusion for the exchange of gases,i.e O2 and CO2.it is done with the help of small openings on the surface of...
Stomata are pore openings underneath plant leaves that can open and close according to the metabolic needs of the plant. gills are a respiratory organs for the extraction of oxygen from water and for...
sharks - have rows of teeth, no scales, can't stop swimming & can't swim backwards, need constant water flow over gills, cartilage - no bone, oily liver instead of a swim bladder, can sense...