Can u help me please

As bacteria are more exposed to antibiotics they become more resilient to them due to mutations or other factors. Over multiple generations the more resilient bacteria survive becoming the new form of that common bacteria.

Explanation:

Is that good?

a

explanation:

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands