The plants utilize a specialized carbon fixation enzyme and a unique cell structure to reduce the problems of photorespiration.

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere, b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify, d)anaerobic bacteria kept thriving with more oxygen

Dna replication or repair occurs in a cell in all of thw following situations except when

Identify two examples of chemical reactions that you have encountered during the last week. identify an exothermic and endothermic reaction. explain.