This document provides evidence from four areas that support the theory of evolution: 1) Fossils show that organisms have changed over time, become extinct, and that life has developed from simple to complex forms. 2) Comparative anatomy reveals homologous, analogous, and vestigial structures that indicate common descent. 3) Embryological development patterns share similarities across species, suggesting shared ancestry. 4) Biochemical similarities in proteins, RNA and DNA provide further evidence that more closely related species share a more recent common ancestor.

1. Evidence of Evolution

2. Go to www.menti.com
 USE THE CODE:
8117068
 In 1 minute, write 3 words you
know about evolution

3. DO YOU BELIEVE THAT WE EVOLVE
FROM APES/CHIMPANZEES?

4. Evidence of Evolution
 EVOLUTION - genetic change in a
population of organisms over time
 4 Types of Evidence that scientists have
gathered in support of evolution
 Fossils
 Comparative Anatomy & Structures
 Embryology
 Biochemistry (Proteins & DNA)

5. Fossils
 What is a FOSSIL?
 The preserved remains or traces of
an organism that is no longer living
 Usually found in
sedimentary rocks

6. What can fossils show?
 Organisms have appeared and
disappeared, and have changed over
time
 Extinction of species
 Reveals ancient climate &
environmental conditions
 Indicates development of life from
simple to complex
 Indicates life began in water

7. Comparative Anatomy
 Study of anatomical structures to find
similarities and differences
 3 TYPES:
 HOMOLOGOUS STRUCTURES –
parts with similar basic structure
(derived from same structures in
embryo—same common descent),
but may vary in function

8.  the arm of a human; the fin of a
whale; the wing of a bat; and the
foot of the cat

9.  ANALOGOUS STRUCTURES – structures
that have the same function (may look
somewhat alike), but have different
structures and DO NOT have a common
descent
Example: wings have developed
independently in insects, reptiles, birds,
and bats

10.  VESTIGIAL STRUCTURES – reduced
body parts (in comparison to the same
complex structure in other organisms)
that have little to no function; remnant of
an ancestor
 Examples:
Human appendix (other mammals
it is necessary to aid in digestion)
Bird wings – Penguins adapted for
swimming, ostrich wings for
balance and courtship

11. Embryology
 Patterns of embryological
development can indicate a common
ancestry
 Fish, birds, mammals & reptiles all
have gills; only fish retain theirs

12. HUMAN CHICKE
N
RABBIT TORTOI
SE
SALAMA
NDER
FISH

14. Biochemical Similarities
 Similarity of proteins, RNA & DNA
molecules
 The more closely related organisms
are, the more similar is the
biochemical makeup
 Indicates common ancestor
 Universality of genetic code –
supports evolution

15. DO YOU BELIEVE THAT WE
EVOLVE FROM
APES/CHIMPANZEES?

16. Humans are not descended from
monkeys or any other primate living
today. We do share a
common ape ancestor
with chimpanzees. It lived between
8 and 6 million years ago.
But humans and chimpanzees
evolved differently from that same
ancestor.

17. ASYNCHOROUNS TIME
 ANSWER the worksheet given

18. THANK YOU AND STAY SAFE