yes, the new MacBook Air comes in 11 inch screens and 13 inch screens
If you meant; "what's in a MacBook?", well... LOTS of things. Just head to the Apple website to find an in-depth description of the hardware and software of the MacBook Pro line. Please be aware that the MacBook line as been discontinued, replaced by the full MacBook Pro & Air line.
It is extremely unlikely. According to reports, the trackpad on the MacBook Air has additional hardware to support the multitouch capabilities. Additional information: http://www.macrumors.com/2008/02/15/advanced-multitouch-trackpad-unique-to-macbook-air/
Macbook air
A 13" laptop case.
No, the Macbook Air does not break easily.
Macbook Air.
The MacBook Pro cases are much larger and sturdier the the MacBook Air cases.
The camera built into current Macs (including the iMac, the Macbook, the Macbook Air, and the Macbook Pro) is known as the iSight
MacBook Pro is the best you can get
For app development for both the design and the coding aspect, the Macbook Air has really nailed it if you do compare Macbook Air with Macbook Pro.
Apple makes the MacBook Air line of laptop computers.
The MacBook Air can access the Internet by joining a wireless network.