Which layer of the atmosphere is most strongly affected by conditions on earth's surface.

In the image, layer a is the topmost layer. layer c contains fossils from the precambrian era. layer b contains dinosaur fossils, and layer a contains fossils of mammals. which two statements are supported by this evidence? 1. mammals lived before the precambrian era. 2. dinosaurs and mammals existed in the precambrian era. 3. dinosaurs evolved after precambrian organisms. 4. precambrian organisms evolved after dinosaurs. 5. precambrian organisms were the first life-forms to become fossilized, according to this sample.

Jason is preparing to write a persuasive argument paper on the treatment of female characters in william shakespeare's works. which source should he refer to while researching? a. a historian's blog devoted to shakespeare's characters b. a literary scholar's essays on shakespeare's characters c. works by authors who have female characters in similar roles d. a wikipedia entry describing shakespeare's characters e. a sociology student's writings on shakespeare's characters

Why might a student decide to take an sat subject test