1. EVOLUTION

2. EVOLUTION : change of a species over time Individuals do not evolve; individuals grow and develop Acquired traits are not passed on to offspring Natural selection is a process that can lead to evolution

4. EVOLUTION : change of a species over time Individuals do not evolve Acquired traits are not passed on to offspring Natural selection is a process that can lead to evolution - a species evolves a trait only if it provides an increase in fitness

12. EVOLUTION : change of a species over time Individuals do not evolve Acquired traits are not passed on to offspring Natural selection is a process that can lead to evolution - a species evolves a trait only if it provides an increase in fitness - variation continues without a selective force

15. VESTIGIAL STRUCTURES : structures that have no function and no longer serve a purpose to the organism - “residual” structures

17. HOMOLOGOUS STRUCTURES : structures from different organisms that have different mature forms but develop from the same embryonic tissues Provides evidence of common ancestry

18. HUMAN FOREARM CAT LEG

20. phylogenetic tree; a branching diagram showing the evolutionary relationships among organisms CLADOGRAMS

21. Modern Organisms Extinct Organisms Common Ancestors gavenche

22. VERTEBRAE = SPINE

24. JAWS TETRAPOD, LUNGS AMNIOTIC EGG MAMMALS