Progression of Classification
· Classifications of things based on....
· Similarities and resemblances
· Characteristics are inherited
· Knowledge comes from close observation and visual description
· Classification based on reproduction and relationships
· Competition and struggle to survive leads to selection of successful traits over time
· Earth is approximately 4.5 billion years old.
· The structure of DNA can be read
Antoni van Leeuwenhoek
- lived from 1707-1778
- devised a system of naming species that would take hold in the scientific community
- based on forms and reproductive structures he grouped relatd living things.
- lived form 1744-1829
- Studied Geology and fossils
- He believed that the environment gives rise to adaptations (webbed feet for birds living near the shore), these changes were then past from parents to their offspring
The Present day Classification
The modern classification is an extension of the system of classification proposed by Carolus Linnaeus. The present system of classification involves a series of graded taxonomic ranks called taxa which include phylum and family in addition to the four taxa introduced by Linnaeus.