As humans, we use the term "spineless" to describe someone like the cowardly lion (spoiler alert: he becomes brave). In science, we refer to things without backbones as what?

An invertebrate is an animal that neither has nor develops a backbone, such as arthropods, mollusks, annelids, and cnidarians. Here's a little something to help you sleep at night - there are likely millions of invertebrates in your home at this very second!

Asked by Rachel Bortles · Last updated 5 years ago · 157.6K views · SOURCE