The colored part of the human eye that controls how much light passes through the pupil is called the?

What best describes lactic acid fermentation?

When elements that form a mineral dissolve in hot water, they form a mixture called a(n) a)geode b)vein c)evaporation d)crystallization e)magma f)lava g)solution h)gem

Are the earth's ocean floor and continents the same age geologically? why or why not?