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Igoryamba
3 years ago
14

When penicillin was first introduced, it was very effective in destroying most

Biology
2 answers:
adell [148]3 years ago
8 0

Answer:

D

Explanation:

D is the correct answer. The rest do not represent evolution / natural selection well, and penicillin's strength has remained the same.

yan [13]3 years ago
5 0

Answer:

D

Explanation:

D is the correct anwser

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