In the Section "Investigating Life: Does Natural Selection Maintain Cystic

Multiple Choice

In the section "Investigating Life: Does Natural Selection Maintain Cystic Fibrosis?," why does water leave the cell by osmosis after the active transport of chloride ions out of the cell by CFTR?

A) The cell is now in a hypertonic solution.
B) The cell is now in a hypotonic solution.
C) The cell is now in an isotonic solution.
D) The cell needs to regenerate the ATP used in active transport.
E) The cell must pump out water to avoid bursting.