Prokaryotic cells do not have membrane bound organelles and eukaryotic cells do have membrane bound organelles
B. Resistance is the tendency for materials to oppose the flow of electric charges.
This has happened before in Yellow Stone National Park in CA. Removing a species form the Pyramid causes the ecosystem to collapse, as species become over hunted and others are starved. One type of organism could become overpopulated, therefor lack of natural variation.
Human,increase population and Overharvesting
