A rock has been formed by the accumulation of bits of minerals and soil that are pressurized together. How should this rock be classified?

organic rocks
Igneous rocks
sedimentary rocks
metamorphic rocks

What type of lipids are found in all biological membranes?

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.

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.