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1.2.1

Classification lesson

Core Concept

1.2 Classification Systems

Slide 1 of 9: What is Classification?

The Living Library

Imagine Earth as a massive library with millions of books (organisms). How do we organize them? We group organisms by the features they share - just like books are grouped by genre!

📚 Why Classify?

  • • Organize 8.7 million species
  • • Identify unknown organisms
  • • Show evolutionary relationships

🔬 How?

  • • Shared structures (wings, fins)
  • • Behavior patterns
  • • DNA sequences (Supplement)

📚 Syllabus Coverage Checklist:

Core: Species definition (fertile offspring)
Core: Binomial system (Genus species)
Core: Dichotomous keys
Supplement: Evolutionary relationships
Supplement: DNA base sequences
Supplement: More recent ancestor = more similar DNA

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