Stem cells,
Stem cells provide new cells for the body as it grows, and replace specialised cells that are damaged or lost. They have two unique properties that enable them to do this: They can divide over and over again to produce new cells. As they divide, they can change into the other types of cell that make up the body.
The pressure would force the water across the membrane to the side with lower solute concentration, if I understand your question correctly. Hope this helps! :)
The thermocline begins at 100 meters.
The thermocline in an aquatic ecosystem presents a layer of water which has a steep decline in temperature. In this layer, the temperature of the water drops much faster than in the layers above. This happens because this layer is a ''buffer'' zone between the warm water of the surface layers and the cold layers of the deep.
So, in this case, in the zone between 100 and 200 meters, there is a sharp decline from 24 degrees to 11 degrees.
C) Chrysophytes is the type of algae that shows a distinct alternation of generations.