Are Micro-organisms Invertebrates?

Are Micro-organisms Invertebrates? These are the micro-organisms: the yeasts, bacteria and fungi, only visible under microscopes; and the invertebrates: the insects, spiders and earthworms, all of which are invaluable contributors to the ecosystems on which food production depends. What kind of organism is invertebrates? An invertebrate is a cold-blooded animal with no backbone. Invertebrates can