C. They all contain a transparent part with at least one curved surface that refracts light.
Hope this helps!!
Isotonic solutions is the term used when the concentrations of solutes inside and outside a cell are in equilibrium.
Explanation:
The isotonic solution is one which have same osmotic pressure on either side of the semi-permeable membrane.
In the isotonic solution there will be free movement of only water molecules and not solutes.
isotonic solution is the solution when two solutions have equal solute concentration.
The concentration of the solution will be in equilibrium.
I am not sure but I am guessing carbon and nitrogen :)
It depends on the weight of the sediments.
