[问答题]
1.Compare and contrast forests and marilmg)lutdk43 r9 ed d,0ne phym-5xc3j2i ju +o-;c* 1zrby:h ppbfob 9h/ukmtoplankton in their role in the carbon zk+-bph 2j cjbmrooy *:1xfuh9c mpb iu-/;5 3cycle.
2.Describe how aquatic autotrophs absorb carbon dioxide from the surroundings.
