Griffith worked with two strains of pneumonia bacteria, which he called rough and:
ASmooth
BSticky
CStrong
DStable
Answer & Solution
Correct answer: A. Smooth
1. One strain had a smooth capsule and one did not.
2. They were named for their appearance.
3. The second was smooth.
_Source: OpenStax Biology 2e, Chapter 14, DNA Structure and Function._
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