What kinds of conditions might prevent a community from returning to its predisturbance state?

How do you transfer mrna into codons ? i'm so confused : (

Photosynthesis uses co2 and cellular respiration produces co2. we call the point when the two processes are in balance--when there is no net production of co2--the compensation point. how might you limit one of the processes in order to achieve a compensation point?

When the oxygen produced by photosynthetic plants in the water dissolves in the water, which of these is being formed?