Answer:
Their Cell walls
Explanation:
Bacteria has a cell made up of peptidoglycan
Archaebacteria has a cell wall made of various compounds)
Their rRNA is different, so different taht tehy are placed on different part of the evolutionary tree.
THe base of the pyramid is built from organisms that primarily
A) are autotrophs.
Im pretty sure it is their feathers not for sure, but i think thats right
Density= mass/volume
volume=mass/density
mass= volume•density
