Transcript File

4/8 Daily Catalyst
Pg.43 Comparative Anatomy
 1. How could radioactive dating help analyze a fossil?
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

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A) Determining the fossil’s age.
B) Determining whether the fossil was animal or a plant.
C) Determining the mass of the fossil.
D) Determining the size of the fossil.
 2. The odd beetle lives in Asia and North America. It normally
feeds on animal fur and hair. During the winter time, animals
fur are long and plentiful, but during the summer, animals lose
their fur coat. How would the odd beetle population be
effected, if global warming continues to rise the earth’s
average temperature?
4/8 Class Business Pg.43 Comparative
Anatomy
 Quiz #11 on Friday
 Evidence for Darwin’s Theory
 Evolution test on Thursday, April 16th
 Study guide due test day
 Review day on Wednesday, April 15th
 Quiz #12 on Review day
 Human body begins on Friday, April 17th
 Zaven- see Mrs. Ireland after class
4/8 Daily Catalyst
Pg.43 Comparative Anatomy
 Daily Catalyst
 Class Business
 Explore Activity Warm up
 Anatomy Notes
 Fossil Range project
 Exit Ticket #9 Anatomy
 Homework: anatomy assignment
4/8 Objective
We will be able to explain how
anatomical evidence supports
Darwin’s theory of evolution.
Darwin believed in
natural selection:
good traits
Pg. 36
Fossils
Comparative
Anatomy
Explore Activity
Directions: As a group, complete the
explore activity. There may be some
unfamiliar vocabulary terms. Give me
your best effort!
Noise: 2 (with group)
Time: 12 minutes
1
2
3
4
6
7
8
Fabien
Amani
Stephe
n
Smoke
y
Ridel
Alfred
Eliud
Jonath
an
Eric
Stepha
nie
Eva
Kayla
Brian
Nicoh
Chris E. Chase
Terriya
n
Andrea Nick
Wyatt
Hefer
Daniel
G.
David
Francis
co
Darrius
Avery
Daniel
V.
Barrian
Zaven
Eduard
o
Travis
5
NOTE TIME!!- Pg. 43
 Key Point #1: Anatomy Definition: The study of structures
 Today, we will compare anatomy of various
organisms and look at how organisms have evolved
over time to better adapt to their environment.
Comparative Anatomy
 There are 3 types of structures we will
look at today.
 Homologous
 Analogous
 Vestigial
 Be ready to take some notes!
What do you notice about these
structures?
Common Ancestor
What do you notice about these
structures?
Key Point #2:
 Key Point #2: Homologous
 Homo- same
 Logous- position
 Organisms have the SAME ancestor and structure but
different functions.
 Why?
 Different environments
Homologous Structures
Evidence for Evolution: Show that two
species evolved from a common
ancestor and have similar evolutionary
origins.
But….
Adapt to live in different environments
What do these organisms have in
common?
What do these organisms have in
common?
Key Point #3
 Key Point #3: Analogous
 Ana- different
 Logous- position
 Organisms have DIFFERENT structures and ancestors but
used for similar functions
 Why?
 Similar environments!
Analogous Structures
Evidence for Evolution: Show that
when organisms live in similar
environments, they will adapt in
similar ways to survive.
But…..
They have different ancestors
What is the purpose of wisdom teeth?
Why do whales
have hip bones if
they don’t have
legs?
Key Point #4
 Key Point #4: Vestigial
 Vestige: small, remaining part
 Body part that is no longer used.
 Why?
 Environment no longer needs it
Vestigial Structures
Evidence for Evolution: Show that a
species has changed over time
(they once needed the structure and
now they do not!).
Practic
e Time!
Is the body shape, homologous, analogous, or
vestigial?
Analogous:
similar
function
Homologous, analogous, or vestigial?
Analogous: similar functions
Letter “c” = hind legs of a baleen whale skeleton
Vestigial: no longer used!!!

Alligators and bats have the same bone structure in
their forelimbs (front legs for alligators, wings for
bats).
HOMOLOGOUS:
similar bone
structure

Humans have wisdom teeth (third molars), even
though they are not needed to chew up food.
VESTIGIAL
 Birds and insects both have wings to fly the sky
ANALOGOUS
 Snakes don’t have legs, but they do have small hip and leg
bones.
VESTIGIAL
Fossil Range Pg. 41 Fossil Range
 Directions: Answer the data analysis questions in your
notebook on page 41. This project is due today. Leave
your notebook on the counter in the back of the class.
 Time: 15 minutes
 Noise: 1 (partner)
Work time
 Directions: Answer the questions in your notebook.
You may work with a partner. This is homework, if
you do not finish. The assignment will be checked
tomorrow.
 Time: 10 minutes
 Noise: 1 (partner)
Exit Ticket #9
Name: _________ Period: 2 Date: 4/8 Score: ___/4
This type of structure…
1. An organism has this structure, but no longer uses
this structure.
2. Is seen in multiple organisms because it came from a
common ancestor.
3. Is seen in multiple organisms because they live in
similar environments.
4. Name the theory that explains why Pangaea split
apart.
Name
Exit Ticket #9
This type of structure…
1. An organism has this structure, but no longer uses this structure.
Vestigial
2. Is seen in multiple organisms because it came from a common
ancestor.
Homologous
3. Is seen in multiple organisms because they live in similar
environments.
Analogous
4. Name the theory that explains why Pangaea split apart.
Continental Drift