Which word best describes the hot ,weak ,inner part of the upper mantle , which can flow ? asthenosphere lithosphere crust core

The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?

Why zebra fish experience similar genetic disease as human

All other things being equal the size of a population will decrease if