Amoebas are unicellular organisms, while human beings are multi-cellular and the most intelligent of organisms. however, both are classified as eukaryotes. how will you justify this reasoning? .

All the organisms are divided into prokaryotes and eukaryotes. Prokaryotes contain the organisms that are single celled and do not have membrane-bound nucleus and other membrane-bound organelle.

Eukaryotes can be single cellular like amoeba or multicellular like humans but all the eukaryotes contain a membrane-bound nucleus in which their genetic material is packed and enclosed and other membrane-bound organelles are also present.

As amoeba have a membrane-bound nucleus which contains its genetic material, therefore, they are considered in eukaryotes. So eukaryotes contain those organisms which have membrane-bound organelle like nucleus and they can be unicellular or multicellular.

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.    

it is prolly d and c and f