Question

Difference between vertebrates and invertebrates

Answer 1

Animals can be classified into two main groups: vertebrates and invertebrates. The main difference between vertebrates and invertebrates is that invertebrates, like insects and flatworms, do not have a backbone or a spinal column. Examples of vertebrates include humans, birds, and snakes.
Comparison chart Invertebrate versus Vertebrate comparison chart
Invertebrate. Vertebrate

About
Animals without a backbone	Animals with an internal skeleton made of bone are called vertebrates.
Kingdom
Animalia	Animalia
Physical Characteristics
Multicellular; no back bone; no cell walls; reproduce sexually; heterotrophic .	Well-developed internal skeleton; highly developed brain; have advanced nervous system; outer covering of protective cellular skin.
Examples
Insects, flatworms etc.	Parrots, Humans, snakes etc
Classification
30 phyla	Classified into five groups: fish, amphibians, reptiles, birds, and mammals.
Phylum
Chordata	Chordata
Size
Small and slow moving.	Big in size.
Species
98% of animal species are invertebrates.	2% of the animal species are vertebrates.
Number of species
~2 million named, many millions more not yet identified	57,739