Naruto or Sasuke? my pref Naruto

Has anyone taken the genetics unit test in connexus? not looking for answers, just a little bit what to expect and some with studying.

The earths core is made up mainly of what 2 substances? 2. like an egg, earth has a core, a layer surrounding the core, and a thin, hard outer layer. which layers of the earth match the layers of an egg?

Define adaptation. why do organisms adapt? give an example.