A parent bacterial cell is able to survive in the presence of the antibiotic penicillin. Subsequent generations from this parent will be penicillin.

A. dependent on
B. killed by
C. resistant to
D. vulnerable to

C. resistant to

To determine the correct answer, we need to understand the mechanism of action of penicillin. Penicillin is an antibiotic that works by inhibiting the growth of bacteria, specifically by interfering with their cell wall synthesis. In the presence of penicillin, susceptible bacteria are unable to build or maintain their cell walls, leading to their death.

Now, considering the question, the parent bacterial cell is already able to survive in the presence of penicillin. This suggests that the parent cell is resistant to the antibiotic and can withstand its effects. The subsequent generations originating from this parent will inherit the same resistance.

Therefore, the correct answer is C. resistant to. These subsequent generations will also be resistant to penicillin and will be able to survive in its presence.