When the concentration of molecules are the SAME on both sides of the cell membrane, the solution is *
A. Hypertonic
B. In equilibrium
C. Hypotonic
D. Kinetic

sex cells are usually half's then they find another half and make a fertilize egg

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.