65 SB Fig. 11.1 is a graph showing the oxygen released and taken up by a tree during a 24 hour period. amount of oxygen released taken up 0600 1200 1800 0000 I I point X time/hours Fig. 11.1 (a) With reference to Fig. 11.1, name the process that produces oxygen from 0600 hours to 1800 hours. ..[1] For Examin Use​