* Species: This is the most specific level, containing only organisms that can interbreed and produce fertile offspring.
* Genus: Groups similar species together. For example, the genus *Pan* includes chimpanzees and gorillas.
* Family: Groups similar genera. For example, the family Hominidae includes humans, chimpanzees, gorillas, and orangutans.
* Order: Groups similar families. For example, the order Primates includes monkeys, apes, and lemurs.
* Class: Groups similar orders. For example, the class Mammalia includes all mammals.
* Phylum: Groups similar classes. For example, the phylum Chordata includes all animals with a backbone.
* Kingdom: Groups similar phyla. For example, the kingdom Animalia includes all animals.
* Domain: The broadest level, grouping similar kingdoms. For example, the domain Eukarya includes all organisms with cells containing a nucleus.
Think of it like a pyramid:
* The bottom (species) is wide, with many individual organisms.
* As you move up, each level becomes narrower, representing fewer organisms but with greater similarities.
Example:
* Species: *Homo sapiens* (humans)
* Genus: *Homo*
* Family: Hominidae
* Order: Primates
* Class: Mammalia
* Phylum: Chordata
* Kingdom: Animalia
* Domain: Eukarya
You can see that as we move up, the number of organisms included decreases, while the level of similarity between those organisms increases.
