Rank the following levels or organization from 1-5 with one being the least inclusive and five being the most inclusive, tissue, organ system, organism, organ and cell

The answer is :

1- Cell

2-Tissue

3- Organ

4-Organ system

5-Organism

Explanation:

The cell is the smallest element, for example neurons. Then come the tissues (set of cells): nerve tissue. The set of organs considered an organ, example: brain. The set of organs forms an organ system (example: central nervous system), and then the set of organ systems forms an organism.

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.    

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.