Plant kingdom makes thier own food and have cell wall as well. thats why plants are consider as autotrophs.
Autotroph, in ecology, an organism that serves as a primary producer in a food chain. Autotrophs obtain energy and nutrients by harnessing sunlight through photosynthesis.
Plant kingdom have various type of autotrophs like photoautotrophs and chemoautotrophs.Autotrophs obtain energy and nutrients by harnessing sunlight through photosynthesis (photoautotrophs) or, more rarely, obtain chemical energy through oxidation (chemoautotrophs) to make organic substances from inorganic ones.
The primary cell wall of land plants is composed of the polysaccharides cellulose, hemicelluloses and pectin.
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