Study Notes
Organisms can be classified based on shared features, which is known as taxonomy. This helps in understanding evolutionary relationships and organizing living organisms into groups. Species — a group of organisms that can reproduce to produce fertile offspring. Example: All mammals have bodies covered in hair and feed young from mammary glands. Binomial System — a method of naming species using two parts: the genus name and the species name. Example: Homo sapiens, where 'Homo' is the genus and 'sapiens' is the species. DNA Sequencing — a method used to classify organisms more accurately by comparing DNA base sequences. Example: More similar DNA sequences indicate a closer evolutionary relationship.
Exam Tips
Key Definitions to Remember
- Species: a group of organisms that can reproduce to produce fertile offspring.
- Binomial System: a two-part naming system for species using genus and species names.
Common Confusions
- Confusing genus and species names in the binomial system.
- Misunderstanding the role of DNA in classification.
Typical Exam Questions
- What is the first part of the scientific name of an organism, using the binomial system? Genus
- What is the most accurate method of deciding how closely related species are? Compare the base sequences of their DNA.
- To which species does Falco peregrinus belong? Peregrinus
What Examiners Usually Test
- Understanding of the binomial naming system.
- Ability to explain how DNA sequences reflect evolutionary relationships.