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: A [[multicellular]] [[organism]] has a large [[Volume (Space)|volume]] compared to its [[Surface Area|surface area]] so it needs parts of its body to have a large [[Surface Area|surface area]] to [[Absorb (Biology)|absorb]] enough [[nutrient]]s and [[Oxygen]].
*[[Catalyst]]s work better when made into [[nanoparticles]] because their [[atom]]s interact with the [[chemical]]s to increase the rate of a [[Chemical Reaction|reaction]] because so when a [[catalyst]] is made into [[nanoparticle]]s the number of [[atom]]s on the [[surface]] of the [[object]] is greater compared to the [[Volume (Space)|volume]] of [[catalyst]] so more of the [[catalyst]]s [[atom]]s can interact with the [[reactant]]s.