Cell walls are made out of cellulose and they give a sturdy structure to the cells (if you notice they have a rectangular shape)
It has to be a, b or d then.
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:)
B-Bioprocessing for forestry products.
Becausebof he law of conservation of evergy. Evergy can not be created of eliminated, therefore it has to be transfered in this case the energy is transfered from one organism to the otherand this process continues at an endless cycle
