Speciation

Here are some additional links on the topic of speciation:

http://bcs.whfreeman.com/thelifewire/content/chp24/2402001.html (the different types on speciation. Please ignore parapatric speciation for now)

http://bcs.whfreeman.com/thelifewire/content/chp24/2402002.html (allopatric speciation specifically)

http://www.mhhe.com/biosci/esp/2001_gbio/folder_structure/ev/m3/s2/evm3s2_4.htm (another on allopatric speciation)

Interactive Animal and Plant Cell

Here's a link to help us see the organelles in a typical animal and plant cell as well as their functions.

http://www.cellsalive.com/cells/cell_model.htm

Lac Operon

I couldn't embed the whole video here so I'm including the link for you to access it on your own. I trust this video will help you understand the way the lac operon functions.

http://vcell.ndsu.nodak.edu/animations/lacOperon/movie-flash.htm