6. What is a supernova? How are supernovae connected to Earth's formation and our own existence?

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above

What's the waste product of electrons and pyruvate combining in fermentation?  

Why is earth's outer core hotter than earth’s oceanic crust? earth’s oceanic crust is denser than earth’s outer core is. earth’s oceanic crust has lava flowing from the mantle. earth’s outer core has a composition of solid iron and nickel. earth’s outer core is deeper within earth than oceanic crust is.