Which statement is true about scientific questions? hey are driven by societal needs and not by curiosity.

They come from recognized knowledge gaps.

They are rigid and cannot be modified.

They must answer multiple things at the same time.

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.    

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.

your spelling is a little off : ]

several tissues working together form an organ, and several organs together make up an organisms.

the group of cell that carries out special jobs are tissue.