human cells in research can lead to ethical problems
Answer:
It depends on where you live, but I live in a Temperate deciduous forest.
Explanation:
Answer: My life is so hard, I have to WALK to school in the Rain every single day. You think that's Bad I have to walk in the pollution, Which hurts people lungs.. They're is nothing else to say but pollution is one of the top Priority's that are causing the earth to die.
Something like that make feedback about a ad cause on the earth or a good one and turn it into a negative thing.
Answer:
diffusion
Explanation:
Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.
