Download 3/18 Daily Catalyst Pg. 33 Comparative Embryology

4/13 Daily Catalyst
Pg. 46 Comparative Embryology
 1. What piece of evidence influence Darwin’s Theory of Evolution
the most?
 2. What type of classification organizes organisms by physical
characteristics? What is a downside to this type of classification?
 3. Compare the lesson on evolution of bacteria to the phrase
survival of the fittest.
 4. Two organisms share the trait of sharp, pronged teeth for
ripping meat off a carcass. Is this an example of homologous,
analogous, or vestigial?
4/13 Class Business
Pg. 46 Comparative Embryology
 Quiz #12 on Wednesday
 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
 Quiz Make up: Wyatt, Ridel, Francisco and Avery
Data
Assessment
Quiz #10 Fossils
Average
1.90
Top Scorers
Chris, Eva, Travis,
Amani, Alfred,
Jonathan,
ET #11 Comparative anatomy 2.61
Stephanie, Stephen,
David, Chase, Ridel,
Hefer, Fabien, Alfred,
Eduardo, Zaven, Kayla,
Eliud
Quiz #11 Darwin’s Evidence
Eva (4.1) and Daniel (4)
1.36
4/13 Class Business
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Pg. 46 Comparative Embryology
Daily Catalyst
Class Business
Review
Comparative Embryology notes
Comparative Embryology project
Exit Ticket #12
Review
Time!
 Which layers are the same age?
 What type of structure is shown below?
 Homologous
 Which layer is older, A or D?
 What type of structure is shown below?
 Vestigial
In your notes
 Draw a cladogram depicting the relationship between
the species, humans with the following specie
information in the chart.
Species
Percent DNA similarity
Chimpanzee
99.6%
Dog
91.3%
Fruit Fly
74.2%
Roundworm
50.8%
CHIMP
DOG
FRUIT FLY
ROUND WORM
Share the LEAST amount of
DNA so furthest apart!
HUMANS
Note time-page 46
 An animal consists of many thousands, millions, even
trillions of cells organized into complex tissues and
organs. The transformation from a zygote to this
multicellular state is truly phenomenal.
 Order and precision are required at every step, and
both are clearly displayed in the first two major
phases of embryonic development”: cleavage and
gastrulation.
Essential Vocab
 Key Point #1: Cleavage
 Rapid succession of cell divisions that produces a ball of cells
(blastula)
 Zygote  Embryo
 Cell does not bigger, just divide into more, smaller cells
 Key Point #2: Importance of Cleavage:
 Creates a multi-cellular embryo
 Organizing process
 Beginning of specialized cells
 For example: Heart cells vs. eye cells
 Key Point #3: Gastrulation:
 Takes blastula  gastrula
 Gastrula- 3 layered cell
 Adds more cells to the embryo
 Sorts cells into distinct layers
 Key Point #4: Importance of gastrulation:
 The 3 layers begin to differentiate into tissues and
organs
 Key Point #5: Evolutionary Significance:
 Embryonic development is controlled by similar genes in
across diverse animal groups
 Limbs develop in a similar way
 Example: human arm vs chicken wing
Comparative Embryology Project
 Directions: Read the pre-reading and answer the questions on
notebook page 46.
 Time: 15 minutes
 Noise: 0 (SILENT)
Comparative Embryology Project
 Directions: Complete and glue in the comparative chart on
notebook page 46. Use the hints to determine where the
embryos belong. Raise your hand with questions. This project is
worth a test grade and will be checked at the end of class.
 Time: until 10:45
 Noise: 1 (with partner)
Exit Ticket #12 DNA
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 Name: _________ Date: 4/13 Period: 1 Score: ____/4
1. What is DNA?
2. If two organisms have little to no DNA similarities, what can we
say about their relation?
3. Why are homologous structures evidence for evolution?
4. Use the diagram to explain the similarity between Human and
Zebras.
Exit Ticket #12
 1. What is DNA?
 All of your genetic information (traits)
 2. If two organisms have little to no DNA similarities, what can we
say about their relation?
 They are not closely related to one another
 3. Why are homologous structures evidence for evolution?
 The structures are similar because they share DNA from a common
ancestor and used for a different purpose due to a different
environment.
 4. Use the diagram to explain the similarity between Human and
Zebras.
 They are not related to one another and only have one amino acid in
common.