Question

2.

bacteria sample	survival time after exposure (hours) - new antibiotic	survival time after exposure (hours) - penicillin
sample b	1	14
sample c	2	12

a new antibiotic was created and tested on three different samples of bacteria for resistance. which statement reflects an accurate analysis and interpretation of the data in this chart?

• the bacteria in all three samples are equally resistant to the new antibiotic and penicillin.
• the bacteria in sample a and c are less resistant to the new antibiotic than to penicillin.
• the bacteria in all three samples are less resistant to the new antibiotic than to penicillin.
• the bacteria in all three samples are more resistant to the new antibiotic than to penicillin.

Explanation:

To determine the correct statement, we analyze the survival times for each bacteria sample with the new antibiotic and Penicillin. Survival time is inversely related to resistance (shorter survival = less resistance, longer survival = more resistance).

• For Sample A: New Antibiotic survival = 1.5 hours, Penicillin = 8 hours. 1.5 < 8 → less resistant to new antibiotic.
• For Sample B: New Antibiotic = 1 hour, Penicillin = 14 hours. 1 < 14 → less resistant to new antibiotic.
• For Sample C: New Antibiotic = 2 hours, Penicillin = 12 hours. 2 < 12 → less resistant to new antibiotic.

Thus, all three samples have shorter survival (less resistance) with the new antibiotic than with Penicillin.

Answer:

The bacteria in all three samples are less resistant to the new antibiotic than to Penicillin.