Question

Many bacteria are now resistant to Penicillin, because

• A. Previously resistant forms survived and reproduced better than non-resistant forms
• B. Penicillin triggers the synthesis of resistant proteins
• C. Penicillin causes gene mutations, some of which are beneficial
• D. Environment inhibits competition among bacteria

Answer 1

The correct option is A Previously resistant forms survived and reproduced better than non-resistant forms

Due to variation in bacteria some of them have resistance from penicillin. Penicillin largely use as killing bacteria but now bacteria develop immunity to penicillin. So bacteria with resistant gene from penicillin transferred character to offspring.

Hence, the correct answer is 'previously resistant forms survived and reproduced better than non-resistant forms'