Levels of Classification

The more levels shared with other organisms, the more you have in common with them and the more closely related you are.

7 Levels of Classification – from broadest (most general) to most specific 1. Kingdom (least # of groups/with many organisms) 2. Phylum 3. Class 4. Order 5. Family 6. Genus 7. Species (more groups and each group has 1 type of organism)

Some ways to help you remember the 7 levels of classification… King Philip Cried Oh For Goodness Sakes Kings Play Cards On Furry Green Stools

In Linneaus’ time people thought all species stayed the same. 1859 – Charles Darwin – theory of evolution – species gradually change over time

Species with similar evolutionary histories are classified closely together (share more levels of classification.)

What information do scientists use to classify organisms? Fossils Comparing body structures of living organisms Comparing reproduction and development of organisms Chemical make-up of cells

1. Fossils

2. Comparing body structures of living organisms

3. Comparing reproduction and development of organisms

4. Chemical make-up of cells