A persian cat shows both the traits for orange fur and black fur. What kind of allele expression is this?.

Mount saint helen the great lakes and death valley are physical features of the earth which scientific term describes these features

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.

What undergraduate degree can a student earn at a four-year college (not specific to a field of study)?