When two substances that cannot dissolve each other are mixed, a
mixture is formed.

Ben is interested in using a source that provides original research, current and developing trends and experts within specific fields. which source should he use?

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.

Match each fossil with the layer where it’ll be present based on those conditions.