What must occur for speciation to happen?

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?

The idea of spontaneous generation was disproved by in a experiment involving jars of meat

Waianapanapa beach in hawaii is a black-sand beach that was formed by waves crashing against volcanic rock. the sand can be very hot on sunny days. which statement best explains why? o a. the black sand has no heat capacity. b. the black sand absorbs no radiation. o c. the black sand is immune to insolation. d. the black sand has a low albedo.