Identify the characteristic(s) of living things illustrated by each of the following statements. Explain your choice for each.
(a) Flowers eventually die.
(b) Plants obtain energy from the Sun.
(c) A zebra runs away from a lioness.
(d) A broken bone heals over time.
(e) Plant roots grow toward moist soil.

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.