Which structure does a virus have in common with a prokaryotic cell?

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?

Which of the following is an eon in the time scale? phanerozoic proterozoic archean all of the above

Which of the following cell structures is significantly different between gram- positive and gram-negative bacteria?