Presentation on theme: "Evidence of Evolution Beyond the Fossil Record. How Does Anatomy and Structure Show Evidence of Ancestry? Comparing the anatomy of different types of."— Presentation transcript:
Evidence of Evolution Beyond the Fossil Record
How Does Anatomy and Structure Show Evidence of Ancestry? Comparing the anatomy of different types of organisms often reveals basic similarities in body structures, even though their functions may be very different.
Common Ancestor A Species from which two or more species have diverged.
Homologous Structures Structures that share common ancestry.
Analogous Structures Analogous structures have similar forms, but they are not due to common ancestry.
Vestigial Structures Vestigial structures are anatomical structures of organisms in a species, which have lost much or all of their original function. Structures that are considered to be evidence for an organisms evolutionary past.
Flightless Cormorant of the Galapagos
Vestigial Pelvis of the Whale
Femur and Pelvis of Whale
How is Embryonic Development Evidence for Evolution? The evolutionary history of organisms is seen in the development of embryos.
What are some common structures that vertebrate embryos share? Tail bud Pharyngeal pouches Buds that become limbs
How are Biological Molecules a Record of Evolution? Species that share common ancestry more closely, have more amino acid sequence in common. Species that have diverged from a distant common ancestor have more differences in amino acid sequences.