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Welcome to Biology Class!

Welcome to Biology Class!. You have 5 minutes to answer the following question …. About how many years ago did photosynthetic life appear?. Two Minutes. Time for Class!.

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Welcome to Biology Class!

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  1. Welcome to Biology Class! You have 5 minutes to answer the following question …

  2. About how many years ago did photosynthetic life appear?

  3. Two Minutes

  4. Time for Class!

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