What is the name of 'special shape' which is given fo objects moving through air (or water) to reduce drag ?

What is the name of pores through which water enters into the body of sponges?

How can you reduce the drag on something moving through the air ?

What is the name of pore through which water comes out from body of sponges?

A fish situated at a depth h below the surface of water in a lake ,can see the outside objects in air through a circular aperature of radius r . What is the radius of the aperture in terms of h and n ,where n = ""_(a) n_(w) ? [ ""_(a) n_(w) = R.I. of water w.r.t. air]

What is the name fo theory which states that life develops from life?

A body shape which offers very little resistance to the flow of air ( or water) around it is called :

What is the special name of frictional exerted by fluids (like air or water) ?