Question

After a strain of bacterial cells is exposed to a chemical mutagen, only 30% of the cells produce new colonies that continue to grow. Which of the following can be concluded?

A. Some cells underwent advantageous mutations.
B. Some cells underwent neutral mutations.
C. Some cells underwent lethal mutations.
D. Some cells underwent deleterious mutations.***

Answer 1

Can somebody check my answer?

Answer 2

It is D

Answer 3

ok thanks

Answer 4

No problem

Answer 5

It was C. I got a 88.9%, so it's ok

Answer 6

Ah, my bad!

Answer 7

Ah. Sorry I did not answer this quick enough. I was reading the definition for lethal mutations. D:

http://www.biology-online.org/dictionary/Lethal_mutation

Answer 8

Actually, I think all you can conclude is that some underwent deleterious mutations. Failure to reproduce is not necessarily death.
I support D.