" The Big Picture!" by Mr C

VSB Science Blog

Bio 11 (2017-18) Evolution Chapter 3 Oct 25

Bio 11 (17-18) Evolution                                     Oct. 25,2017

 

 

Last lessons Objective

 

 

Darwin’s Daring Proposal

Evaluation
Today’s Objectives o  1) Adaptive Radiation and what Darwin did not know

o  Gradual Rate of Evolution

o  Punctuated Equilibrium

o  Evalutation Timeline

Topic

Number One

Review

Darwin verses Lamarck

Key differences in vocabulary

Lamarck

Acquired Characteristic

Law of Use and Disuse

 

Darwin

Struggle for existence via Malthus

Competition and survival of fittest via Wallace.

 

Remember 4 Examples included those found in the text.

 

What neither knew was the source of diversity in traits in a population.

 

The idea of adaptive radiation is a noun..it is a concept that proposes the the more diverse the population the easier it is for that population to radiate and adapt to a larger range of areas.

 Lab due at end of the week
Topic

Number Two

 

So whose theory did Darwin argue with?

Darwin verse Lamarack

 

Darwin’s argument

A yahoo version

https://ca.answers.yahoo.com/question/index?qid=20081117214639AAYoR72

 

An more academic version

http://www.plosin.com/work/OneLongArgument.html

 

Lets revise..and simply

 

If a population grows without any limiting factor is grows at a geometric rate.

Geometric growth leads to over population

Yet there is no over population and this is due to “a struggle for existence” ( related to economics idea by Malthus)

 

Part two

With a population, the is a diverse range of how a trait is shown. (think about a litter of puppies).

 

Those traits that allow the species to survive, are passed onto the next generation.

 

The mechanism that select which traits are passied onto the next generation is a natural selection.

Note..”survival of the fittest” was not first written by Darwin.

https://en.wikipedia.org/wiki/Survival_of_the_fittest

 

Also

Wallace also noticed a selection process by natural sources in his collection of animals.

http://people.wku.edu/charles.smith/index1.htm

The main focus of Darwin’s argument was to challenge Lamarck’s idea that individual species changed with time due to use and disuse of traits.

 

He used fossil records and data acquired in his five year voyage to propose “the origin of the species”.

 

In regards to his interpretation of changes in beak structure of finches, we should not that

Each island had limited predation, a unique habitat that created a variety of food sources. These factors within the environment were used to support his argument.

 

Lamarck

http://evolution.berkeley.edu/evolibrary/article/history_09

 

http://www.sparknotes.com/biology/evolution/lamarck/section2.rhtml

 

http://necsi.edu/projects/evolution/lamarck/lamarck/lamarck_lamarck.html

 

 

Darwin Verses Lamarck

Powerpoint

http://www.powershow.com/view/3fa45-YTgyN/Darwin_vs_Lamarck_powerpoint_ppt_presentation

 

Comparison Table

http://www.indiana.edu/~ensiweb/lessons/ev.mech.pdf

 

 

Focus Questions:

Is a theory a fact?

How does the scientific method provide structure to create a theory?

How are direct and indirect evidence used to replace an actual experiment that validates Darwin’s ideas?

Is there a way to create an experiment that could validate the mechanisms of evolution?

For Darwin, what selects a trait?

How does this differ with Lamarck?

What is a common missing factor that both Darwin and Lamarck did not know about?

How could you disprove Lamarck idea of an acquired characteristics?

 

Rate of Change within evolution

 

Gradual Change

 

 

Punctuated equilibrium

https://en.wikipedia.org/wiki/Punctuated_equilibrium

 

Gradualism verse punctuated

http://evolution.about.com/od/evidence/a/Transitional-Fossils.htm

 

Venn diagram to compare

https://rbssbiology11ilos.wikispaces.com/Compare+Gradual+Change+and+Punctuated+Equilibrium

 

Focus Questions

 

 

 

Topic

Number Three

 

answering question about natural selection

http://www.actionbioscience.org/evolution/futuyma.html

 

Note:

This is not a proof that changes occur with time, it is a proposal of the mechanism as to why things change with time.

 

Artificial Selection

 

https://simple.wikipedia.org/wiki/Artificial_selection

 

 

http://evolution.berkeley.edu/evolibrary/article/evo_30

Text book Ref

 

Chapter Three

Case study on Moths (Natural Selection)

Page 96 in Nelson Text

Answer all question and put into green duotang

 

Case study DDT ( Artificial Selection)

Page 101 in Nelson Text

Answer all questions and put into green duotang

You tube Reference Natural Selection Rap

https://www.youtube.com/watch?v=irrKFXCoi0A

 

Artificial Selection Rap

https://www.brainpickings.org/2013/06/14/the-rap-guide-to-evolution-baba-brinkman/

 

Take Home Message A theory is a form of an objective argument based upon evidence that is usually used to support a hypothesis that has been replicated in a variety of formats.

 

Theories can change with time and they are not facts.

 

To create a logically sound argument, it is wise to examine objective evidence that both supports and argues the premise that you are defending.

 

Do not go into a battle of wits with an unarmed opponent.

posted by Marc Bernard Carmichael in Science 10 and have No Comments

No comments

Leave a Reply

Your email address will not be published.


*