Cells in the stomach produce an enzyme called pepsin to help digest food. Pepsin is most effective at a pH of 2. Which of these graphs most likely shows what will happen to the
activity of pepsin as the pH of the stomach is increased?
A.
B.
EFFECT OF PH
ON PEPSIN ACTIVITY
EFFECT OF PH
ON PEPSIN ACTIVITY
Pepsin Activity
Pepsin Activity
0
2
3
2
PH
EFFECT OF PH
ON PEPSIN ACTIVITY
pH
EFFECT OF PH
ON PEPSIN ACTIVITY
D.
C.
Pepsin Activity
Pepsin Activity
0
3
pH
N
A b c d

1. -define adaptation2 explain darwin's theories of descent with modification and natural selection in detail3. -explain how each of these provides evidence for evolution: a. -fossil record, including superposition and transitional fossilsb-anatomy, including homologous structuresc-biological molecules, including dna and proteins4. -explain the difference between convergent and divergent evolution.5. -define and give three examples of artificial selection6. -define and give one example of coevolution.7. -explain biodiversity and how it benefits humans.8. -explain a type of population lest affected by environmental change.