Question

Which of the following is the best example of evolution occurring?

Some of the trees in places with harsh winters lose their leaves in the fall.
Strains of bacteria can become immune to antibiotics that once killed them effectively.
Viruses can attack single-celled organisms as well as multicellular organisms.
Lions and cows both have hair covering their bodies and give birth to live offspring.

Answer 1

I think it is B or D I'm leaning towards D

Answer 2

@Awolflover1

Answer 3

if you get the flu shoot this year you have to get it again next year because the virus evolves.

Answer 4

So it is B?

Answer 5

yes

Answer 6

B