Download Evidence Supporting Evolution

Evidence Supporting Evolution
Fossils
Anatomical Structures
Definition:
Embryology
Definition:
Definition:
Studied by:
Biochemical
Definition:
Also Known As:
Two types show
common
ancestry
Used to determine:
Does NOT show
common
ancestry
Examples:
Vestigial
Structure
Features
perform similar
functions in
organisms but
are structurally
different
And:
Examples:
Human arm & Cat
Leg
Examples:
Ostrich’s wings
An embryo is an unborn animal
or human young in its earliest
phases.
Examples:
Butterfly wing &
Bird wing
Fish, Reptiles, Birds, & Humans
all have gill slits in early stages
of development but fish are the
only ones to develop gills as an
adult.
“Life Chemicals”
Scientists Study Two Types:
DNA
Closely related organisms:
A remnant or trace of an organism of a past geologic
age, such as a skeleton or leaf imprint, embedded
and preserved in earth’s crust.
Paleontologists
Study of the formation, early growth, and
development of living organisms
Proteins
Body structures of a living organism
Human appendix
Features that are similar in structure
but appear in different organisms and
have different functions
Whale flipper & Bat
wing
Analogous Structures
Remnants or organs or structures that
had a function in an early ancestor
Fly wing & Bat wing
History of life on earth
How different groups of organisms
have evolved
Homologous Structures
Study of the chemical substances and
vital processes occurring in living
organisms
Alligator leg & Bird
wing
Fish, Reptiles, Birds, & Humans all have tail
structures in early stages of development but
humans do not develop tails in mature forms
like fish, reptiles, & birds do
Have more similarities in their
DNA and/or proteins