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Q1 – Week 9 – 19-20

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week 9

Week of 10/29 – 11/2

 
10/29 – Monday – period 7 – Academic Study Hall
 
                                         – period 8
1.  Re-Submit Origin of Life Form.
 
1: Genetic Drift/Natural Selection/Gene Flow —-> Speciation ——>  Extinction ——> Adaptive radiation
2: Review Speciation to Grola bears / punctuated equilibrium —> polyploidy
3: Dat/ Excel Brine Shrimp Lab – Explaining results /conclusion
 

Some People are very serious about phytoplankton.

This is a tattoo from a graduate assistant at Hofstra University.

I believe this tattoo are dinoflagellates:

Origin of life

 
10/29 – Monday Homework:
 
1:  If you have not already, please make your UNIQUE data tables with error bars for the Brine          
      Shrimp Lab and insert them into the google doc for the Lab.
 
2.  Results and Conclusion section – begin writing. (1st Draft Due Wednesday Morning).
 
3:  Please complete the Evolution of Oxygen Form  form using the videos listed below:

Video 1:

Video 2: (1:30 – 3:00)
 
Video 3 : (0nly up to about 14 min)
Video 4:  complete video

10/30 – Tuesday – period 7/8 – 
1:  Review Review Speciation to Origin of Life Form, endosymbiosis of chloroplast and mitochondria 
 
2.  Lab 2 – Flourescent light vs. LED health lab data gathering.
 
3.  LAB – Brine Shrimp Lab
Endosymbiosis – 
 
Symbiogenesis, or endosymbiotic theory, is an evolutionary theory that explains the origin of eukaryotic cells from prokaryotes. It states that several key organelles of eukaryotes originated as a symbiosis between separate single-celled organisms

The Origin of living systems is explained by natural processes.

The process of evolution explains the diversity and unity of life. A number of experimental investigations have provided evidence that the conditions early in the Earth’s history provided an environment capable of generating complex organic molecules and simple cell-like structures. For example, in the “organic soup” model, the hypothesized primitive atmosphere contained inorganic precursors from which organic molecules could have been synthesized through natural chemical reactions catalyzed by the input of energy. In turn, these molecules served as monomers (building blocks) for the formation of more complex molecules, including amino acids and nucleotides. Some models suggest that primitive life developed on biogenic surfaces, such as clay, that served as templates and catalysts for assembly of macromolecules. Under laboratory conditions, complex polymers and self-replicating molecules can spontaneously assemble. It remains an open question whether the first genetic and self-replicating material was DNA or RNA.

10/30 – Tuesday  Homework:  

1.  Complete the Results and Conclusion section (1st draft) of the Brine Shrimp Lab:

2.  Please read my notes above and then please read the article about Stanley Miller below: 

http://blogs.scientificamerican.com/cross-check/stanley-miller-and-the-quest-to-understand-lifes-beginning/

Be prepared to to have a RAT Quiz on this article tomorrow.

I will explain the Rat Quiz tomorrow.

It might help to make a NORT of the article. 🙂

End of Tuesday.


10/31 – Wednesday – period 7 – Academic Study Hall
 
                                                – period 8
1: Stanley Miller Rat
2: Stanley Miller Review
                              

Origin of life

 

10/31 – Wednesday Homework:

 
1) Read article on the RNA world Hypothesis
 
 
Skip the  Self-Replicating Molecules Undergo Natural Selection
 
2) Watch video : It is important to read the article first.

 

3)  We will have a quiz on this article and reading in class.
 
The quiz will be in a RAT Format:  
 

11/1 – Thursday – period 7/8
 
1.  RNA hypothesis RAT
2. REviewed RNA hypothesis RAT
 
Review of what is expected in a conclusion
 
Lab: 2 – Class Data collaboration of LED and Fluorescent grown plants:
Students collaborated tallied means and SD for the 2 NEW groups of Fast Plants that were grown under different light from “birth”.
 
New data tables were being made. Still waiting for Val…
 
 
11/1 – Thursday – period 7/8
 
OKAY  From reading a couple of labs it its clear that many of you STILL NEED a lot of work on this lab write-up.
I am going to continue to make comments into the night but I will not be able to get to all of your labs THUS
 
YOUR homework is the following:
 
1: Continue writing your conclusion and general write – up – for LAB 4 :
  If I get to your lab with comments you have a guide.
  If not read the conclusion rubric below.
 
I WILL BE LOCKING LAB 4 THEM FOR GRADING FRIDAY EVENING.
 
2.  Complete the new data table and Graph for Lab 2 from the data posted below:
Lab 2 Data Today:
 LED  Fluorescent
 # of Plants 169 64
 height mean 9.38 cm 5.5 cm
 sd4.39 1.97 
THANKS VAL! 
3. Add the second procedure.
 
CONCLUSION RUBRIC:
Conclusion:  This section will be heavily scrutinized. YOU NEED 3 PARTS.
 
    1. FROM YOUR DATA, determine whether the hypothesis was supported or not supported!  Your hypothesis is never wrong!!! You need to explain in detail why you believe your hypothesis was not supported.  This is not a one word or one sentence response.  It requires you to think!!!  Think of the data that is obvious but also think hard about what the data may be implying.  Error bars should be part of the discussion, and a description that you are using +/- 2 SEM.  Error bars are helpful in our discussion but they are not the end of the story. Even if the error bars overlap there may still be some “possible” trend.  You need something to sink your teeth into.  There is always something that you can imply from the data.  Think of a prosecuting attorney.  You are building your case or arguments for or against your Hypothesis.
 
    2. MAKE A LEAP from your DATA.  What does the data imply or suggest about the Biology of the Brine Shrimp?  Do not get lost in the sauce. What was the major purpose of the lab?  What was you question that you tested with your hypothesis?  That question is what you are trying to answer based on the data!  Make a leap from numbers (data) and try to logically describe what this means in term of the living organism. You cannot be wrong here unless you use poor logic.  This area is conjecture and IT MAY NOT BE TRUE and that is why OTHER experiments are needed to test these ideas.  Experiments in the future will measure your ideas.  I am asking you to fully develop your ideas regarding how the data reflects the Brine Shrimps biology.  This takes thought!
 
    3. Write and error analysis.  Discuss the limitations of this experiment.  Every experiment has limitations as these limitations will affect our outcome by some margin.  Most experiments test one dependent variable against the independent variable by controlling other dependent variables.  What was the control and did we control the other variables that COULD affect the Hatching viability besides Saline percentages?  Fully develop your ideas on how these limitations may have affected you results. DO not just list the possible error but describe how these errors or limitation could have skewed our data.  DO NOT INCLUDE HUMAN ERROR.
General Comments:
If you get vague you will lose points. You must fully develop your points and support them with logic! Remember that many experiments are built from the conclusions of other labs.  This means your points in your discussion will not be facts but just very good possible explanations.  Another experiment would be needed to test the validity of these statements. However,  if you support your statements with solid logic from evidence collected in the lab then you are addressing all the possible implications from YOUR WORK or experiment.  In this point of your conclusion you will be MAKING A LEAP from your work based on data analysis to a POSSIBLE implication BIOLOGICALLY for the Brine Shrimp.  If you do this by tying the Background discussion with your discussion here it will result in very will impressive lab write – up! 
YOU WILL NEED A LEAST A PAGE (SINGLE SPACED) TO COMPLETE A CONCLUSION!
 

 

 BRINE SHRIMP CONClUSION REQUIREMENTS:

 
Please make sure your conclusion covers three basics:
 
            A:  DATA analysis:  complete detailed analysis of the the hard data collected.
                      This has nothing to do with error analysis!!! You should be taking into consideration the                      error bars that you have created in your graph.  The error bars tell us something about                          the reliability of the data.  Also we are NOT proving a hypothesis correct or wrong. The   
                     data “suggests” or there is a possibility..
 
            B:   A LEAP:  You need to explain what the data means in terms of the biology of the organism. The data    
                        suggests that the Brine Shrimp ……. This really the reason for the investigation.  Fully develop your  
                        thoughts based on your evidence.  Be logical and make your case as if you were a lawyer trying to  
                        convince a jury of your argument.
 
             C:  Error Analysis:  What are the possible limitations in your lab.  Every experiment has limitations. What    
                       were the limitations in this experiment. What could be done to narrow our approach to better the 
                        questions you laid out in this lab.
 
* DO NOT MAKE comments that are not logical and are not supported by the evidence.  This is an area of conjecture and speculation so it cannot be wrong unless you do not fully develop your thoughts and support your statements with sound logic.  
 

11/2 – Friday – period 7 – Academic Study Hall
 
                                – period 8
1. BRINE SHRIMP Lab Write- up:
BioChemistry!
2, Lewis dot Diagrams of organic molecules
 
Valence electrons/covalent bonds/stability – organic molecule
Amino acid structure – R groups, different Amino acid differ by R groups
Peptide bond basics – water leaves (dehydration synthesis) and the N and C bond maintaining proper stability.  Polar molecule vs. Nonpolar molecule.
 
Classwork – 
Large Organic Molecules Lewis Structures.pdf
View Download
 
                          
11/2 – Friday Homework:
 
1: Study for the test Next week (later in the week).
 
See last Friday for the test studying details..
 
2.  Complete your Brine Shrimp Lab – I will not lock you out until I read all of your labs, give you feedback, and then give you an opportunity to re-write.
3. Please watch the lecture (below the form) and with the Covalent ditto 1 -Electron Dot Diagrams worksheet I gave out today.
 
I mention R – groups from Amino Acids. these are parts of the amino acids that can be polar or non- polar.  

 

So these molecules are amino acids! They are what the DNA codes for and when you connect these amino acids you get a protein!

The R groups are the part of the amino acid that is in green and these can be polar and non- polar!

Covalent ditto 1 -Electron Dot Diagrams worksheet.pdf
View Download
 
Covalent ditto 1 -Electron Dot Diagrams key p.pdf
View Download
4.  Complete the entire worksheet (write the Lewis dot structure) and label each molecule as either polar or non- polar.
 
5. Review with the key above.
 
6. Complete Polar vs, Nonpolar Molecules Form.

Polar vs. Nonpolar Molecules 1819

 
Lecture for Covalent ditto 1 -Electron Dot Diagrams worksheet:

 

 

End of week 9!