How are the Arctic and Antarctic ecosystems of the tundra similar? How are they different?

Afixed resistor has the following color bands: orange, red, brown, gold. what is the rated resistance

The measure of the angles supplement is 30 more than four times that of its complement. find the measure of the angle described

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.