Kyla Stevenson (October 21,2009)

What we did Today: (Tuesday, October 20,2009)

-Reviewed Lamarks Theory
-Learned the concept of Allopatric Speciation
-Started talking about our new project on nematodes

My Thoughts:

-One new term i learned this class was Allopatric Speciation.

-It was also nice to do some reviewing on Lamark, and what he contributed to the theory of Evolution.

-Another new thing i learned in class was what a nematode is, the project seems like it's going to be exciting.

Above and Beyond:

-The link below shows a picture of what the nematode looks like:
http://www.ars-grin.gov/ars/SoAtlantic/fp/stpp/burelle/nematode.jpg

-Key Facts of Lamarks Theory:

• Environmental changes create new needs.
• Simple species come from Spontaneous Generation.
• Structures that aren't used diminish.
• Traits are passed on to offspring.
• The theory however is incorrect, traits are not passed on.
• The main contribution was: Evolution is adaptive, ad species change over time in response to environmental pressure.

Allopatric Speciation:  means new species being formed due to isolation.

-Three main points of Allopatric Speciation:

• Physical barrier separates populations in to two or more groups isolated from each other.
• Natural Selection.
• Accumilated physical and behavioural differences.