The reproductive cycle in females is regulated
primarily by
(1) estrogen and testosterone
(2) estrogen and progesterone
(3) progesterone and insulin
(4) progesterone and testosterone

What causes the force that pushes magma from the magma chamber through the pipe and vent of a volcano?

In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity

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