Biogeochemical Cycles
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Paul Andersen surveys organisms in the protists. He reviews the diversity found within the domain Eukarya and explains that the Kindgom Protista is simple a junk drawer for organisms that don't fit elsewhere.
Paul Andersen explains how plants use hormones to respond to their environment. The following hormones are detailed; auxin, cytokinins, gibberelins, abscisic acid and ethylene.