Processes of Evolution - Evidence of Evolution

Question 1

Fossil records

Answer 1

Most fossils are found within layers of sedimentary rocks called strata. Deeper strata = older fossils and therefore different time periods can be compared.

Question 2

Homologous structures

Answer 2

Anatomical features that are derived from a common ancestor - might be adapted for different purposes

Question 2

Comparative Anatomy

Answer 2

Comparing anatomy of different species supports the notion of a common ancestor. closely related species have more anatomical similarities

Question 3

Analogous structures

Answer 3

Structural features that serve a common function in various species but have different ancestral origins

Question 4

vestigial structures

Answer 4

Some animals possess inherited features that are no longer needed i.e whales have remains of hip-bones - signifies whales evolved from a four-legged ancestor

Question 5

comparing embryology

Answer 5

comparing embryos of animals as they develop - we find more similarities before they are fully developed