Evidence of Evolution

Question 1

A transitional fossil is

Answer 1

any fossilized remains of a life form that has common traits to
- both an ancestral group
- and its derived descendant group

Question 2

derived descendant group

Answer 2

a lineage of a larger group

Question 3

Homologies

Answer 3

evidence for common ancestry

Question 4

what are some homologies

Answer 4

• body structures
• embryos
• vestigials
• DNA sequences

Question 5

body structures

Answer 5

(ex. vertebrate limbs) -> homologous structures

Question 6

embryos

Answer 6

a source of homologies that only appear early on in development

Question 7

vestigials

Answer 7

homologies that have a reduced/no function

Question 8

DNA sequences

Answer 8

greater % similar = more recent common ancestors

Question 9

Biogeographical evidence

Answer 9

the study of the geographical distribution of organisms, provides information about how and when species may have evolved.

Question 10

Fossils

Answer 10

provide evidence of long-term evolutionary changes, documenting the past existence of species that are now extinct.