the layer is in the middle of the stratosphere it is important because it absorbs a lot of the radiation from the sun before it can reach us on earth​

In the analysis of hair and fiber samples, which does a compound comparison microscope allow for that a conventional compound microscope does not? a. simultaneous observation b. polarization c. fluorescence d. higher magnification

Iam in desperate need of with this !

Who discovered a pattern to the elements in 1869?