Humans develop antibiotics to fight bacterial infections. However some antibiotics are no longer effective in killing the bacteria they once killed. How does the theory of evolution explain this?
a. The antibiotic mutated the bacteria, which allowed resistance to develop.
b. After being exposed to the antibiotic, individual bacteria acquired the ability to resist the antibiotic.
c. Genetic variation in bacteria made it possible for some individuals to have resistance to the antibiotic, survive and reproduce.
d. The antibiotic mutated to an ineffective form.

Question

Humans develop antibiotics to fight bacterial infections. However some antibiotics are no longer effective in killing the bacteria they once killed. How does the theory of evolution explain this?
a.	The antibiotic mutated the bacteria, which allowed resistance to develop. 
b.	After being exposed to the antibiotic, individual bacteria acquired the ability to resist the antibiotic. 
c.	Genetic variation in bacteria made it possible for some individuals to have resistance to the antibiotic, survive and reproduce.
d.	The antibiotic mutated to an ineffective form.

anonymous · Answer

its c

anonymous · Answer

I am so confused please help me

anonymous · Answer

Thanks can u help with a few more

anonymous · Answer

ok what do you wanna know?

anonymous · Answer

2.	Study the amino acid sequences of the same protein taken from four different species of plants. Which pair of plants is most closely related? 
Species 1: -A-P-A-C-W- 
Species 2: -G-P-G-S-F- 
Species 3: -A-P-A-C-F- 
Species 4: -N-K-M-H-H- 
a.	Species 2 and 4 
b.	Species 1 and 3 
c.	Species 3 and 4 
d.	Species 1 and 2

anonymous · Answer

The correct option is (a)