Evolution (Diana Drake)

evoultion 01evolution 2 evolution 03

http://www.youtube.com/watch?v=FpfAZaVhx3kevolution 05

 

A great example of this is the foot of a pig, more specifically one toe does not have any purpose. This is because it evolved over time.

 

evolution 06

evolution 07 evolution 08 evolution 09 evolution 10

Homologous Features

evolution 11

Analogous Features

evolution 12 evolution 13

http://www.youtube.com/watch?v=CvrmZLGWfFs evolution 14

Natural Selection

evolution 15 evolution 16 evolution 17

Directional Selection

 

evolution 18

Stabilizing Selection

evolution 19

Disruptive Selection

evolution 20

Sexual Selection

evolution 21 evolution 22 evolution 23

Genetic Drift

evolution 24

Bottleneck effect

evolution 25 evolution 26

Speciation

evolution 27

Reproductive Isolation

evolution 28

Allopatric Isolation

evolution 29

Sympatic Isolation

evolution 30

http://www.pbs.org/wgbh/evolution/index.html

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s