why do some colonies appear with blank center? and can two colonies be fused?

2 Answers

  • Anonymous
    1 month ago

    Two colonies can fuse if they are of compatible type.

  • 1 month ago

    One possibility is that the bacteria in the center have already died OR migrated.  They use up resources in the middle / leave waste products, and the motile ones then swim away.

    Yes, two colonies can fuse.  You're doing your serial dilutions to reduce that happening.

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