Characteristics of living things

List the common characteristics of living things
What is the source/reason for the diversity of living organisms (different species)?
What is the source of diversity of cell types in an individual organism?
Describe the major differences between prokaryotic and eukaryotic cells
Be prepared to describe the eukaryotic organelles. (don’t need to answer here).
Explain the theory of the origin of mitochondria and chloroplasts.
Explain why membranes (internal and external ) are important for life?