Scientists believe that the earth's early atmosphere lacked gas because photosynthetic organisms did not yet exist.

They said i have got a sign of tuberculosis what should i do

In this experiment you were asked to present three possible mechanisms. describe those mechanisms here and include drawings of those mechanisms. how will the bromination of trans-cinnamic acid and trans-stilbene allow you to distinguish between the three possibilities? what would you expect to find in your data in each scenario?

Which is one example of a phenotypic change that is not genetic