1. Students
Get handout - Trouble in Paradise – Story due FRIDAY
Pull out Learning logs
80% = 21……parts a, b, c, etc are each 1
Phones in bin…muted or off…please & thank you

2. Graded “Pocket Mouse video” worksheet
Answer key found on-line & used
1st – 1
2nd – 2
4th – 13
6th – 4
7th – 4
8th – 1
Wife read along with me
%ages, same order, key common words for 4 questions
Review Honor code…..
Anyone who accessed answer key – directly or copied
I expect some will contact me….that would be good
If not by midnight then I will contact you….BAD

3. Essential Questions
LO 1.14 The student is able to pose scientific questions that correctly
identify essential properties of shared, core life processes that provide
insights into the history of life on Earth.
LO 1.15 The student is able to describe specific examples of conserved
core biological processes and features shared by all domains or within
one domain of life, and how these shared, conserved core processes
and features support the concept of common ancestry for all organisms.
LO 1.16 The student is able to justify the scientific claim that organisms
share many conserved core processes and features that evolved and
are widely distributed among organisms today.
LO 1.27 The student is able to describe a scientific hypothesis about the
origin of life on Earth.
LO 1.28 The student is able to evaluate scientific questions based on
hypotheses about the origin of life on Earth.
LO 1.29 The student is able to describe the reasons for revisions of
scientific hypotheses of the origin of life on Earth.
LO 1.30 The student is able to evaluate scientific hypotheses about the

4. More Essential Questions
LO 1.31 The student is able to evaluate the accuracy and legitimacy of
data to answer scientific questions about the origin of life on Earth.
LO 1.32 The student is able to justify the selection of geological,
physical, and chemical data that reveal early Earth conditions.

5. Ch 26: The Tree of Life-An Intro to Biological Diversity
What do you know about the origins of life on Earth?
Earth is 4.6 billion yrs old (byo)
Oldest rocks – 3.8 byo – Greenland
Oldest fossils – 3.5 byo
How was primitive Earth different than current Earth?
Little O2, much H2O, CH4, CO, CO2, N2
Lightning
Volcanic activity
UV radiation
Meteorite bombardment
How do we get “the living” from “the non-living?”
1920’s Oparin & Haldane postulated early Earth favored rxns that formed organic cmpds from inorganic cmpds
1953 Miller-Urey experiment test Oparin & Haldane’s hypothesis

6. Figure 26.2 Can organic molecules form in a reducing atmosphere?
Repeated experiments have formed
All 20 amino acids
several sugars
lipids
purines & pyrimidines
ATP (when phosphate is added)
ALL MONOMERS needed for life

7. Students
Thank you for texts, s, etc – missing 2 students
Working together….
Books
Trade ins?
On tables
Phones in bin…muted or off…please & thank you

8. Ch 26: The Tree of Life-An Intro to Biological Diversity
What do you know about the origins of life on Earth?
How was primitive Earth different than current Earth?
How do we get “the living” from “the non-living?”
1920’s Oparin & Haldane postulated early Earth favored rxns that formed organic cmpds from inorganic cmpds
1953 Miller-Urey experiment test Oparin& Haldane’s hypothesis
How were monomers connected to make polymers?
Sydney Fox dripped monomers on hot sand, clay or rocks
Created proteinoids – polypeptides created by abiotic means
What’s next?
Protobionts – abiotically produced molecules surrounded by a membrane
Primitive cells
Coacervate – stable protobiont droplet that self-assembles when a suspension of macromolecules is shaken
Imprecise reproduction
Simple metabolism & excitability (similar to neurons)
How does natural selection fit in?
- Protobionts best suited to their environment could reproduce & create others best suited to their environment

9. Figure 26.4 Laboratory versions of protobionts
20 m
(a) Simple reproduction. This lipo- some is “giving birth” to smaller liposomes (LM).
(b) Simple metabolism. If enzymes—in this case, phosphorylase and amylase—are included in the solution from which the droplets self-assemble, some liposomes can carry out simple metabolic reactions and export the products.
Glucose-phosphate
Phosphorylase
Starch
Amylase
Maltose
Phosphate
Primitive glycolysis – common to all organisms

10. Ch 26: The Tree of Life-An Intro to Biological Diversity
What do you know about the origins of life on Earth?
How was primitive Earth different than current Earth?
How do we get “the living” from “the non-living?”
How were monomers connected to make polymers?
What’s next?
Protobionts – abiotically produced molecules surrounded by a membrane
Primitive cells
Imprecise reproduction
Simple metabolism & excitability (similar to neurons)
How does natural selection fit in?
Protobionts best suited to their environment could reproduce & create others best suited to their environment
What was the first genetic material?
RNA – single stranded
Ribozymes – can replicate RNA

11. Figure 26.5 A ribozyme capable of replicating RNA
(RNA molecule)
Template
Nucleotides
Complementary RNA copy 3 5
Collections of RNA molecules best suited for their environment replicate their RNA & reproduce
mRNA, rRNA, tRNA all interact with each other now during translation

12. Ch 26: The Tree of Life-An Intro to Biological Diversity
What do you know about the origins of life on Earth?
How was primitive Earth different than current Earth?
How do we get “the living” from “the non-living?”
How were monomers connected to make polymers?
What’s next?
How does natural selection fit in?
What was the first genetic material?
8. What is the origin of photosynthesis?
Cyanobacteria (formerly known as blue-green algae)
H2S metabolizing bacteria mutated to use…….
H2O
Released O2 reacted with dissolved iron
Formed iron oxide precipitate

13. Figure 26.12 Banded iron formations: evidence of oxygenic photosynthesis

14. Students
Get 2 handouts
Cladogram Activity
Investigation:….. (BLAST Lab)
Trouble in Paradise – due Friday
Parking announcement….
Phones in bin…muted or off….please & thank you

15. Ch 26: The Tree of Life-An Intro to Biological Diversity
What do you know about the origins of life on Earth?
How was primitive Earth different than current Earth?
How do we get “the living” from “the non-living?”
How were monomers connected to make polymers?
What’s next?
How does natural selection fit in?
What was the first genetic material?
8. What is the origin of photosynthesis?
Cyanobacteria (formerly known as blue-green algae)
H2S metabolizing bacteria mutated to use…….
H2O
Released O2 reacted with dissolved iron
Formed iron oxide precipitate
9. How did eukaryotes originate?
- Endosymbiosis

16. (a) Aerobic prokaryote (b) Photosynthetic prokaryote
Figure Endosymbiosis
(a) Aerobic prokaryote
(b) Photosynthetic prokaryote
0.2 m
1 m
Respiratory
membrane
Thylakoid
membranes
Serial endosymbiosis gave rise to proposed phylogenetic tree

17. Figure 28.3 Diversity of plastids produced by secondary endosymbiosis
Cyanobacterium
Heterotrophic
eukaryote
Primary
endosymbiosis
Red algae
Green algae
Secondary
Plastid
Dinoflagellates
Apicomplexans
Ciliates
Stramenopiles
Euglenids
Chlorarachniophytes
Alveolates
Plastid – plant organelle

18. Ch 26: The Tree of Life-An Intro to Biological Diversity
What do you know about the origins of life on Earth?
How was primitive Earth different than current Earth?
How do we get “the living” from “the non-living?”
How were monomers connected to make polymers?
What’s next?
How does natural selection fit in?
What was the first genetic material?
8. What is the origin of photosynthesis?
How did eukaryotes originate?
What is the evidence for endosymbiosis?
Similarities between bacteria and mitochondria & chloroplasts
Size
Reproduction by binary fission
Small, circular genomes
DNA sequence
Enzymes & transport systems
tRNA & ribosomes for transcription & translation
Current endosymbiotic relationships
11. Natural selection over millions of years
led to a diversity of the 1st prokaryotes
Diversity of organisms led to classification

19. Figure 26.22 One current view of biological diversity
Proteobacteria
Chlamydias
Spirochetes
Cyanobacteria
Gram-positive bacteria
Korarchaeotes
Euryarchaeotes, crenarchaeotes, nanoarchaeotes
Diplomonads, parabasalids
Euglenozoans
Alveolates (dinoflagellates, apicomplexans, ciliates)
Stramenopiles (water molds, diatoms, golden algae, brown algae)
Cercozoans, radiolarians
Red algae
Chlorophytes
Charophyceans
Domain Archaea
Domain Eukarya
Universal ancestor
Domain Bacteria
Chapter 27
Chapter 28

20. Chapter 29 Chapter 30 Chapter 28 Chapter 31 Chapter 32 Chapters 33, 34
Bryophytes (mosses, liverworts, hornworts)
Plants
Fungi
Animals
Seedless vascular plants (ferns)
Gymnosperms
Angiosperms
Amoebozoans (amoebas, slime molds)
Chytrids
Zygote fungi
Arbuscular mycorrhizal fungi
Sac fungi
Club fungi
Choanoflagellates
Sponges
Cnidarians (jellies, coral)
Bilaterally symmetrical animals (annelis,
arthropods, molluscs, echinoderms, vertebrate)
Chapter 29
Chapter 30
Chapter 28
Chapter 31
Chapter 32
Chapters 33, 34

21. Students
Turn in BLAST Lab
Review Session – 7AM
3:15
Tomorrow
FRQ Test (50 pts)
4 FRQ (1 long & 3 short)
25 pts x 2
Learning logs due
Wednesday – MC & Math (50 pts)
36 MC questions (1.25 pts)
31 test bank
5 from AP exams
2 math questions (2.5 pts)
Phones in bin…
Off or muted
Please & thank you

22. Students
Cans (Transport is next week)
Separate dry from canned
Tie bags & place in bin
Log into notebook
4 items from me
31 MC questions
5 AP questions (BLUE)
2 math questions (1/2 sheet)
1 scantron (BLUE) Form A or B??
Get calculator from counter…if needed
REMINDER: You signed an Honor Code
DO NOT SHARE INFO WITH LATER CLASSES
Phones in bin…muted or off…please & thank you
Place finished FRQs on my front table