Which two types of evidence led from the theory of continental drift to the theory of plate tectonics?

1. World maps in 1858 showed how Africa and South America fit together.
2. Oceanographers' maps revealed mid-ocean ridges and oceanic trenches.
3. Fossils discovered in the 1830s showed that Earth had grown warmer over
time.
4. Seismic data helped scientists identify the boundaries of tectonic plates.

Many free radicals combine to form molecules that do not contain any unpaired electrons. the driving force for the radical–radical combination reaction is the formation of a new electron‑pair bond. consider the chemical equation. n(g)+no(g)⟶nno(g) n(g)+no(g)⟶nno(g) write lewis formulas for the reactant and product species in the chemical equation. include nonbonding electrons. n(g)n(g) select draw rings more erase select draw rings more erase select draw rings more erase n no(g)