Bacteria provides a valuable clue to the origin of life on earth. which of these is the most likely process by which bacteria was formed? a. appearance of new plants b. adaptation of living things c. geological transformation of earth's crust d. chemical transformation of non-living matter

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You can decrease the resistance of a length of wire by

Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.