Which definition is the best for “semipermeable membrane”? It is a barrier that prevents materials from moving from one side to the other.

It is a barrier that allows materials to move freely from one side to the other.

It is a barrier with tiny openings that let some, but not all, materials pass through.

It is a barrier that helps materials move from one side to the other.

Which definition is the best for “semipermeable membrane”?

A semipermeable membrane is a layer that only certain molecules can pass through. Semipermeable membranes can be both biological and artificial.

So Answer = D

whose power in the senate is equal to the power of the speaker of the house?

mount st. helens in washington erupts, causing a massive avalanche and killing 57 people on this day in 1980. ash from the volcanic eruption fell as far away as minnesota. seismic activity at mount st. helens, which is 96 miles south of seattle, began on march 16.