Question

A company develops a new antibiotic. When the antibiotic is first used, it kills nearly all the bacteria.

Which statement explains why after 10 years, nearly all the bacteria can tolerate the antibiotic and survive?

Answer 1

A.
The company needed to apply another application since all of the bacteria were immediately resistant to the antibiotic. Those resistant bacteria survived and reproduced, passing on traits that helped them survive onto their mutant offspring.

B.
At first, none of the bacteria were resistant to the antibiotic. Over time, a few of the bacteria became resistant to (or could tolerate) the antibiotic survived and reproduced, but did not pass any of these traits to their offspring.

Answer 2

C.
At first, most of the bacteria were sensitive to the antibiotic. Only the few bacteria that were resistant to (or could tolerate) the antibiotic survived and reproduced, passing on traits that helped them survive.

D.
At first, most of the bacteria were resistant to the antibiotic. Only the few bacteria that were resistant to (or could tolerate) the antibiotic survived and reproduced, but did not pass any of these traits to their offspring.

Answer 3

What do you think? How does natural selection work?

Answer 4

i think it is b i do not now why tho i just have a feeling that it may be it