1. Review your notebook for our new unit: Decomposer CVR – Stamp
Opening Activity: Feb. 7, 2017
Review your notebook for our new unit:
Decomposer CVR – Stamp
Opening Activities (1/25, 1/26, 1/27 & 1/30)
Final Review Sheet
Cells Alive and Stamp
Lab #11 Data Table and Analysis Questions w/ Stamp
Membrane/Cell Review
Homework:
Complete Initial Ideas if not done in class.
I can…Explain how scales can be used to study organisms

2. Scales for Biology 2 Organism (human) Biosphere Atom Tissue
Organize the terms from smallest to largest:
Organism (human)
Biosphere
Atom
Tissue
Population (of humans)
Ecosystem
Body System
Community
Cell
Molecule
Organ

3. Large, Macro, Micro, & Atomic-Molecular
Scales for Biology 2
Organize the terms from smallest to largest: Organism, Biosphere, Atom, Tissue, Population, Molecule, Ecosystem, Community, Cell, Biosphere, Molecule.
Compare with your partner and class.
Identify each section of your organization with the following scales.
Large, Macro, Micro, & Atomic-Molecular
4. How do these scales work together to support growth in organisms.

5. Pick up a planaria prediction at front table.
Opening Activity: Feb. 8, 2017
Pick up a planaria prediction at front table.
Name a vocabulary word from each scale discussed yesterday.
Homework:
Complete Initial Ideas if not done in class.
I can…Predict changes in planaria at different scales

6. What are Planaria? Freshwater flatworms (phylum: Platyhelminthes)
Live in freshwater under leaves and stones
Avoid light (“negative phototaxis”)
Free living – not parasites
Carnivores – eat decaying meat, insects and larvae (egg yolks or liver in the lab)
1-20 mm in size
Long lived
Use sexual or asexual reproduction
This picture has been released it into the public domain.

7. Overview of Brown Planaria Dugesia tigrina

8. Planaria are complex organisms with systems and tissues
Nervous
System
Gastrovascular
System

9. Excretory/Osmoregulatory
System
Reproductive
System

10. Today: Observe the planaria
Initial Ideas: How do you think planaria generation will occur at the organism, cellular, and molecular levels?
Tomorrow:
Decide how your team will cut your experimental planaria (Planaria B)
Write hypotheses for each planaria: control, cut in half (A), and your experimental planaria (B)
Set up your lab notebook to collect data
Label containers for your planaria

11. I will come around and stamp your planaria predictions.
Opening Activity: Feb. 9, 2017
I will come around and stamp your planaria predictions.
Share your ideas from your predictions at your table. Create a list of the following:
2 ideas that are similar to yours.
2 ideas that are different than yours.
I can…make a hypothesis on the regeneration of planaria. Identify a 4th biomolecule.
Homework:
DNA Monomer Coloring

12. Ethical Treatment of Animals
3 Rs of humane experimental techniques:
Replacement: Where possible, substitute non-living materials (i.e. prepared tissue slides)
Reduction: Limit the number of animals used, but do not increase the suffering of individual animals
Refinement: Minimize the impact of any procedure or condition on the wellbeing of the animal

13. Student Laboratory Investigation
Each team will observe 3 planaria:
Experimental Planaria A
Every team will cut this into half, separating
the anterior from the posterior halves.
Experimental Planaria B
This will be cut in a manner determined by your team.
Control Planaria C (for class)
This will not be cut.
Used with permission from UC Museum of Paleontology

14. Plenty of Planaria

15. Care and Feeding of Planaria
The water is very important! Fresh water from a pond, stream or lake is best; spring water is adequate
Keep cultures in a cool, dark place
Feed planaria at least once a week
Change the water twice a week, especially after feeding
After cutting them, the cultures should not be fed

16. I will stamp your planaria hypothesis.
Opening Activity: Feb. 10, 2017
I will stamp your planaria hypothesis.
List the following variables from Lab #12
Manipulating Variable
Responding Variable
Control Variables (list 3)
3. What was the “Experimental Control”?
I can…Identify the monomers and create a model of the 4th biomolecule.
Homework:
Maybe….

17. DNA = Deoxyribonucleic Acid STORES GENETIC INFORMATION
The 4th Biomolecule
DNA = Deoxyribonucleic Acid
STORES GENETIC INFORMATION
Example of a polymer

18. Comparing DNA to other Biomolecules
Atoms
# of atoms in one molecule
Glucose
C, H, O 24
Starch
~1000
Phospholipids
120
Protein
C, H, O,N
500,000
DNA
DNA Atoms – CHONP
# of Atoms – 4.25 billion in each chromosome

19. DNA is arranged into polymers called chromosomes (built from nucleotide monomers)
Chromosomes can get packed together to take up less space
Chromosome = single molecule of DNA

20. DNA forms a double helix…
Discovered by Rosalind Franklin, James Watson & Francis Crick

21. DNA is made of monomers called nucleotides

22. DNA is made of monomers called nucleotides
Adenine (A)
Guanine (G)
Pairs to 
Thymine (T)
Cytosine (C)

23. Nucleotides always pair specifically = complementary base pairing
A - T
C - G

24. Let’s make a double helix!
Lab #13 Modeling DNA
Let’s make a double helix!
Color the parts of the nucleotide monomers as follows:
Adenine (A) = red Cytosine (C) = blue
Guanine (G) = green Thymine (T) = yellow
Sugar = orange Phosphate = purple
Color and cut out each of the monomers.
Link monomers (biosynthesis) to build chromosomes. The left side of your double helix should spell CAT.
Use the remaining nucleotide monomers to finish the complementary strand of the double helix.
Draw your DNA molecule and answer questions in journal.
Group Quiz – When whole group is done, quiz and STAMP!