Which of the following is an example of active transport?
a. osmosis of water across the cell membrane
b. transport of glucose into a cell
c. the sodium-potassium pump found in nerve cells
d. none of the above

4.06 hc)a five-year review of threats to the southern resident orca population of the united states concluded that the top threats were prey availability, contaminants, and effects from recreational and whale watching vessels. further down the list are oil spills, disease, and effects from commercial vessels not targeting whales. how might this list be different if it were for transient whale populations, which have a larger average population size and live farther offshore in open waters? a)the transient population is more likely to be affected by contaminants. b)the transient population is less likely to be affected by whale watching vessels. c)the transient population is more likely to be affected by disease. d)the transient population is less likely to be affected by prey availability.

About how much of the cell mass is watet

Which of the following requires the use of energy and the of transport proteins to move a molecule across a cell membrane?