Question

A pathogenic strain of bacteria has become resistant to an antibiotic that once could kill it. What has happened to these bacteria to make this happen?

Answer 1

The bacterial cells learned to remove the receptors on their cell surfaces, making it impossible for the antibiotic to attack them.

Most of the bacteria make changes to their DNA to protect themselves, making themselves immune to future attacks.

Some of the bacterial cells were able to produce toxins against the antibiotics, making them more likely to survive.

Only the few bacteria that were immune to the antibiotic survived and reproduced, making all their offspring immune to it as well.

Answer 2

@superhelp101 help

Answer 3

i would choose the last option
it seems the most right

Answer 4

super help is such an awesome person :D