A taxonomic <xref>kingdom</xref> within the <xref>domain</xref> <xref>Eukaryota</xref> — the <xref>plants</xref>. About 300,000 <xref>species</xref> of <xref>organism</xref> that all contain <xref>chlorophyll</xref> to obtain <xref>energy</xref> from the <xref>sun</xref>.