Answered

What happened when Griffith injected mice with the harmless, R-strain bacteria alone?

AThe bacteria transformed.
BThe mouse lived.
CThe mouse died.
DThe bacteria died.

Verified Answer :

sbcardinals

B. The mouse lived.  

Answer:

Option B, The mouse lived.

Explanation:

In Griffith's experiments three major observations were made -

a) Injecting the mice with S - strain bacteria - The S - strain bacteria's were infected bacteria's and hence when these S -bacteria's  were injected into the mice ,they were killed due to infection.

b) Injecting with R -strain harmless bacteria - These being harmless did not affected the mice and hence they remained healthy and alive

c) Injecting heated S -strain into R -strain infected mice - These mice also developed the disease due to virulent remains of heated S -strain affecting the R -strain.

Hence, option B is correct

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