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Q1 – Week 9- 10/25 – 10/29

                                                                                                                                Jump to:  Tuesday,   Wednesday,  Thursday,   Friday                                                                                                                                   ___________________________________________________________

10/25 – Monday –  A Day – 

Main focus –                                                                                                                                                          
a)  Artemia / Brine Shrimp lab setup – day 0                                                        
                                                                                                                                                                                                        b) Lab 1 – Fast Plant seed harvest
 
1. We will begin our Brine Shrimp Lab (3) – set-up
              Set-up petri dishes for .5%, 1.0%, 1.5%, 2.0% solutions
                                                                                                                                                                                                                                                 Which saline solution did Natural Selection favor?

2. We will start the seed harvest for Lab 1         

                                                                               

Brine Shrimp Lab set-up: 

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10/25 – Monday’s Homework: –

1) Watch a lecture on possible cause of the 5 mass extinctions:
 
 
2) Fill the form below on Mass extinction Hypothesis:
 
 
2: Mass Extinction Hypothesis Form 21-22

End of Monday!

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10/26 – Tuesday –  B Day – 

Main focus –                                                                                                                                                          
a)  Artemia / Brine Shrimp lab data collection – day 1 – 24 hour period                                                        
Abigal’s “shrimpy” 10/26/21
                                                                                                                                                                                                        b) Lab 1 – Fast Plant seed harvest
 
1. We will count the number of hatched eggs by identifying swimmers and removing them.

2. We will complete the seed harvest for Lab 1 if you did not complete it yesterday.         

                                                                               

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10/26 – Tuesday’s Homework: –

                                                                                                                                                                                                                                 1. Complete form after reading the paragraph below. 

                                                                                                                                                                                                                                              Life continues to evolve within a changing environment.

Speciation and extinction have occurred throughout the Earth’s history, and life continues to evolve within a changing environment. However, the rates of speciation and extinction vary. Speciation can be slow and gradual or, as described by punctuated equilibrium, can occur in “bursts” followed by relatively quiet periods. At times of ecological stress, extinction rates can be rapid, and mass extinctions are often followed by adaptive radiation, the rapid evolution of species when new habitats open. Scientific evidence, including emergent diseases, chemical resistance and genomic data, supports the idea that evolution occurs for all organisms and that evolution explains the diversity of life on the planet.

A species can be defined as a group of individuals capable of interbreeding and exchanging genetic information to produce viable, fertile offspring. New species arise when two populations diverge from a common ancestor and become reproductively isolated. Although speciation can occur by different processes, reproductive isolation must be maintained for a species to remain distinct. Evidence that speciation has occurred includes fossil records and genomic data.

2.  Complete the form by using the Evolution 2 Presentation below the form:

2: Evolution and Speciation Form 21-22

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10/27 – Wednesday –  A Day – 

Main focus –                                                                                                                                                       
  
a)  Review of the Mass Extinction Form/graded
   
b)  Artemia / Brine Shrimp lab data collection – day 2 – 48 hour period                                                        
Today’s picture?
 
1. We will count the number of hatched eggs by identifying swimmers and removing them.                                                                                                                                                                                                                                                                                              Mass Extinction Form – KEY
                                                                                                                                                                               
2. Review of the  Mass extinction form –

        Medernia hypothesis end of the world 

Genetic Drift / Genetic drift / Natural selection –> lowering of genetic variability that could make one small population reproductively isolated by a pre – zygotic barrier. —-> creates a new species —> but is genetically susceptible to extinction because of lowered genetic variability.
 
Mass extinctions prove how susceptible many of the species were!  Dinosaurs were never going to dominate the landscape forever! 
 
What made the mammals susceptible in the Permian mass extinction made them more suitable after the KT event!

   

                                                                               

Evolution Presentation: 

End of Tuesday..

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10/27 – Wednesday’s Homework: –

                                                                                                                                                                                                                               

1:  Please use the form as your guide to view the following videos and complete the form:
 
                                                            YOU ONLY get one response to this form!
 
I will send out grades tomorrow morning!

 
1: The Plankton Form 21-22

 

Five Reasons to Thank Plankton:


  

Planet Ocean:


  

NASA – Phytoplankton Levels Dropping:


  

 Invisible Ocean: Plankton & Plastic

End of Wednesday.
  

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10/28 – Thursday –  B Day – 

Main focus –                                                                                                                                                       
  
a)  Review of the Mass Extinction Form/graded
   
b)  Artemia / Brine Shrimp lab data collection – day 3 – 72 hour period                                                        
1. We will count the number of hatched eggs by identifying swimmers and removing them for the 72 hour period.                                                                                                                                                                                                                                                
                                                                                                                                                                           
2. Review of the  Evolution and Speciation Form and The Plankton form

        

Today’s Connections:

A gas mask of hydrogen sulfide has the potential to save lives in the future because humans have adapted to have a tolerance for hydrogen sulfide. This was probably a selective pressure that allowed mammals to survive both the Permian and Triassic mass extinctions.  Hydrogen sulfide slows down the metabolism and mimics “cold blooded” organisms metabolism who use the environment to maintain their metabolism. Warm blooded organisms spend a lot of energy keeping their own metabolism (temperature high) no matter what the temperature is in the environment and are selected for in colder climates. Coldblooded animals spend far less energy on their metabolism and thus are selected for in warm climates.

Based on the Kump hypothesis, the Permian,  Triassic, and, and KT occurred because of a trigger of increased carbon dioxide that lead to a microbial take-over that produced hydrogen sulfide.  The increased carbon dioxide, will increases the acidity in our oceans that will kill out plankton layer, which is responsible for producing most of our oxygen and all of the food in our oceans. Phytoplankton, the plankton that uses photosynthesis to produce the organic material for life in out oceans. Photosynthesis takes in carbon dioxide and water and produced organic matter (food) for the rest of the ocean AND releases OXYGEN for the rest of us!! Also the increased warming of the poles (ice caps) will decrease the ocean currents and make our oceans more stagnant which will decrease oxygen levels even more.  The loss of oxygen will allow the hydrogen sulfide microbes to increase in number as they cannot survive with oxygen.

Mammals or their most recent ancestors WHO ALREADY HAD had a mutation that increased reproductive fitness by allowing them to move slower and require less oxygen (less of it was available due to the death of phytoplankton). Only the small mammal ancestors survived as larger mammals who started to dominate the landscape as the biggest creatures on the planet BEFORE the dinosaurs perished because of there LARGER oxygen requirement NEEDED FOR LARGER ENERGY NEEDS to keep their larger bodies maintaining a higher metabolism.

The hydrogen sulfide has the ability to cool down the body long enough to keep a person alive for critical care. A person who is given hydrogen sulfide will come out of it perfectly fine, with the exception of lost brain tissue. However, in a choice between living and loss of brain tissue, losing brain tissue seems like a more advantageous option. This as not an issue with early mammals because their brains were smaller.

Phytosaur: lizard like
Lycaenops: reptilian mammal/ endothermia

 

Gorgonopsia – reptilian mammal/ endothermia

 

                                                                               

r _____________________

10/28 – Thursday’s Homework: –

                                                                                                                                                                                                                               

1:  Please use the Evolution Presentation and the Origin of Life Presentation Presentation to complete the form below:
 
              YOU 3 get three submissions to this form! Now you can appreciate tonights form!
 

Evolution Presentation: 

End of Tuesday..

Evolution Presentation: 

End of Tuesday..

 
1: Speciation into the Origin of Life Form 21-22

 

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10/29 – Friday –  B Day – 

Main focus –                                                                                                                                                       
  
a)  Artemia / Brine Shrimp lab data – collect entire data
b) Back to the Fast Plants!                                                        
 
1.  We will gather the percent hatching viability for the entire class. The lab that you will write – up  for the Brine shrimp will have YOUR Data and the classes.                                                                                                                                                
Please download the following Excel file to build your class data table:                                                                                                
Brine Shrimp Excel Template 
Download                                                                                                                                                                                                                    
2. We will plant our second generation of Fast Plants – F2 Finally!!!!                                                                                                                                                                                                                                                                                             

Fast Plants: 

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10/29 – Friday’s Homework: –

                                                                                                                                                                                                                               

1:  Please begin making formal lab tables and graphs for the Brine Shrimp Lab – It will be your 2nd formal write-up.
I will send you a link for the google doc that I want you to post the data tables to.  Use your excel file that we made  for Lab 2 to design a your graphs and data tables.                                                                                                                                                                                  
  End of week 9!