Squinting in the sunlight is an autonomic body function.
Yeah yeah so :D,
Large polar molecules can only cross the membrane with the help of protein named channel protein and carrier protein.
So, this both proteins act like a gate, the large molecules enter the protein and the protein let the large molecules in to the membrane. (see the picture so that you can understand more, its carrier protein)
the only difference between channel protein and carrier protein is, channel proteins has fixed shape while carrier protein can flip.
C. Since they have to gain that skill.
A. because the iced tea mix dissolves in the water therefore it is a solvent <span />
As you grow father away from the mid ocean ridge the rock is older as you get closer the rock is younger