invertebrate has backbones and vertebrates has no backbone Animals can be classified into two main groups: Vertebratesand invertebrates. The main difference between vertebrates and invertebrates is that invertebrates do not have a backbone or a spinal column. Examples of vertebrates are birds and snakes while some invertebrates are insects and flatworms.
A vertebrate is a creature with a backbone, or spine, so that would be the defining feature in most cases. Vertebrates are usually large animals too, ones that require the additional solidarity provided by a backbone. There are many other defining features, but a spine is one that can be used across all the many different types of vertebrates.
bilateral symmetry
yes, a spine is one of the defining features of what is a fish
the nucleus
I don't now
The tuatara has a spinal column with vertebrae, which is the defining characteristic of a vertebrate.
heterotrophs
The defining characteristic of a Vertebrate is an internal skeleton. Orangutans have an internal skeleton so they are vertebrates.
The defining feature of a nation-state is that it will have a constituent citizenry, a government and defined borders. A constituent citizenry also means a fixed territory in which it claims jurisdiction and sovereignty.
John Stuart Mill
An invertebrate doesnt have a backbone. A vertebrate has a backbone.
A jelly fish. Cnidarian's have a sting cell called a cnidnocyte which is the defining feature.
Yes. Dogs are vertebrates, and one of the defining features of a vertebrate is a cranial neural enlargement often referred to as the brain.
Prokaryotic cells, unlike eukaryotic cells, do NOT contain a nucleus.