Chromosomes other than sex chromosomes are autosomes.
a. true
b. false

The given statement is true.

Explanation:

The chromosomes that do not carry any genes, which determine the sex of an organism are known as autosomes. That is, all the chromosomes other than sex chromosomes are termed as autosomes. The chromosomes that carry sex-determining genes are termed as sex chromosomes.  

There is one sex chromosome pair, referred by X and Y in mammals, and all the rest twenty-two pairs are autosomes.  

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.    

i am going to guess that it is co2.