Evolution & Adaptation

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Presentation transcript:

Evolution & Adaptation David Mense Lead Science Teacher Lee County Schools

Who’s This Guy?

Evolution by Natural Selection

Why did they even go to The Galapagos Islands?

Who is This?

Common?

Common?

Common?

Evolutionary Similarities Homologous Share a common ancestor – similar structure but not function. Analogous Share a common function but not a common ancestor Selection Pressure compared to common ancestor

Homologous or Analogous Wing of a Bat – Wing of a Moth Forearm of a Human – Wing of a Bird Forearm of a Frog – Flipper of a Whale Bill of Platypus – Bill of a Duck Forearm of a Human – Foreleg of a Cat Forearm of a Human – Wing of a Bat

Vestigial Structures Genetically determined structures or attributes that have lost some or all of their function, but have been retained due to the process of evolution.

Vestigial Structures - Animals

Hyoid Bone