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Write the conclusion Griffith arrived at the end of his experiment with Streptococcus pneumoniae. |
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Answer» Griffith observed a change of living R-strain Streptococcus Pneumoniae (non-virulent type) into living S-bacteria, when injected along with heat-killed S-type (virulent) and called transformation. The phenomenon was discovered by Frederick Griffith 1928. The R-strain non-virulent bacteria pick up the trait of virulence from dead bacteria Griffith Proposed that the transforming principle' is a chemical substance released by heat-killed bacteria. It was a permanent genetic change as the new S-type bacteria formed only S-type. |
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