The flesh on the inside of an apple is white, and devoid of pigments. Why is this the case?

Which property is used to identify the origin of an igneous rock? color density hardness crystal size

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.

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water