What do we call the smallest unit of matter or an organism? cell

animal

species

system

A. Cell

Cells are microscopic "building blocks" that make up all the organisms or matter.  

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protein synthesis is an example of feedback mechanism which in homeostasis

answer; /// i really don't understand your question/statement.but/lions do fight over territory and breeding rights, sometimes to the death,this is called( i hope this answered your luck