D) Freshwater is a hypotonic solution, which causes the plant cells to swell because of turgor pressure.
Explanation;
Osmosis is the process by which water molecules move from the region where they are highly concentrated to a region where they are lowly concentrated through a semipermeable membrane. One application of osmosis is support in plants.
Hypotonic solution is a type of solution that has more solvent molecules in this case water and less solute molecules.
Fresh water is hypotonic to plant cells thus the plant cells absorbs water osmotically, increases in size and becomes turgid, which generates an outside opposite pressure that is equal to the wall pressure which keeps the plants upright.
The increased temperature causes the water to be less dense because the extra heat energy causes the water molecules to spread out more as the molecules have more kinetic energy. Therefore, the current would become weaker because there is less dense water sinking to create this current.
The compound microscope is the type of microscope that uses bright illumination and multiple glass lenses. This type of microscope uses not only one but many double convex lenses. It also makes use of the visible light that the eyes can see.
