Explain how a group of organisms that is separated from the rest of its species can evolve different traits.

substitution is the answer in this case

it is called the mitotic spindle

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.

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

good luck!