Cell Division in Animals
This is a brief computer-animated video that describes differentiation in animals at the cellular level (cell division).  Once the cells are differentiated they lose the ability to divide. As a result, one cannot grow a whole animal in a culture medium from a single cell. The growth of the whole animal in a single cell is only possible in the early stages of development - after the first one or two divisions. Other key words include: ectoderm, mesoderm, and endoderm.  Run time 01:51.
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Concentrate on Distracted Driving: A Challenge to MIT Students from U.S. Transportation Secretary Ra
From the MIT News Office:

Research has shown that talking on a phone while driving, even with a hands-free cell phone, causes as much of an impairment to driving ability as being drunk. And yet, says U.S. Secretary of Transportation
Ray LaHood, while the nation has successfully cracked down on drunk driving, when it com

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Invertebrate Fossils - Lesson 16 - Part 3 of 7

In InvertebrateFossils - Lesson 16 - Part 3 of 7 you will learn about multi-cell advantagesand see and experiment that shows how multi-cell formation works.  Trilobites are also discussed, as is anIllustrated Geological time scale showing organisms from the Pre-Cambrian timeperiod.  An excellent informationalvideo on Invertebrate fossils.