How can u identify a prokaryotic cell

Features that helps in identifying a prokaryotic cell :

In the prokaryotic cell the absence of organised nucleus is observed. Membrane bound organelles are also absent in the prokaryotic cell. The DNA present is the central part of the cell. which is termed as the nucleoid. The cell wall present in the prokaryotic cell is seen acting as an extra layer of protection, that is required for maintaining the shape as well as preventing it from dehydration. The DNA present is double stranded and circular

an adaptation is a change or process by which an organism takes to be better suited for its environment. for example; migration is a behavioral adaptation, this is needed because birds are not built to last extremely cold climates. there are different adaptations because there are different species needing to adjust to different things, bears don't migrate; they hibernate.