Molecular biology is a field of biology that looks at the molecular machinery of life. The field was founded in the early 1930s, though the phrase was only used in 1938 and the field didn't take off until the late 50s and early 60s. Since then, progress in the field has been massive.
The Ionosphere and the Exosphere (minor layers) are parts of the Thermosphere (major layer). The ionosphere is part of the theremosphere.
Asker's rating. 1  Parts Of Operating System. 2  The two main internal components of an OS are: 3  The Kernal is the main one. 4  Easiest way is to buy an external USB hard drive enclosure. 5  As for Unix Its Kernel and Shell. 6  Well, really, there is just the kernel. 7  first is mother board & second is power supplier ( ccb) MS Â· 10 years ago.