Aspecialized part of a cell which performs a definite function is?

answer:

if a cell is called the basic unit of life, then a group of cells together make up the tissues. these groups of cells have a common origin with a similar structure. and the groups of cells perform a definite function. so, in simple terms, tissues can be defined as a group of cells performing similar functions.

explanation:

answer: i am pretty sure the answer is " cell organelle ".

explanation: i've taken very long lessons on this, and am pretty sure this is the correct function.

cell organelles, cells, tissues, organs, and organ system.

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from my research i have to the conclusion that decomposers, such as fungi, bacteria and invertebrates, play a critical role in nutrient cycling and without them the earth's ecosystem may not support life as we know it. elements such as carbon, nitrogen and phosphorus exist in limited amounts on earth, although huge amounts of carbon are being released into the atmosphere from underground sources now by humans. it is still extremely important that other nutrients be retained by the process of re-use. decomposers are organisms that are able to chemically break down dead material and make these elements available for use by other organisms. without this breakdown of dead material, dead bodies would pile up. so decomposers also play a role in clean up also. without them, life might not continue as we know it and dead material would overwhelm the earth.    

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