What's the layer of material found at the innermost part of wood?
a. sapwood
b. cork cambium
c. vascular cambium
d. heartwood

If you opened a tree and wanted to see what is in the middle, you would see that it is D. Heartwood. It is very coveted because it often used in creating artistic things or in making high quality furniture and wooden floors and there can only be a limited amount of heartwood per tree so getting it can be bad for the environment if you're not careful.

What's the question?

passive transport is a movement of biochemicals and other atomic or molecular substances across cell membranes without need of energy input. unlike active transport, it does not require an input of cellular energy because it is instead driven by the tendency of the system to grow in entropy.

~wikipedia

so, according to what that says, i believe it's hypertonic and hypotonic.

good luck!