Digestive secretions with a pH of 2 are characteristic of the A) small intestine.
B) stomach.
C) pancreas.
D) liver.
E) mouth.

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

When in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? view available hint(s)when in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? active transportexocytosis

Which feature would you expect to find in a population in which sexual selection depends on male competition?