Explain Why rubies and sapphires which are both forms of the mineral corundum are different colors.

Explain the cause for movement river valley civilization to early industrial centers

Drag each label to the correct location on the image. the diagram shows the development of the oocyte and the follicle during the menstrual cycle. identify at which sare at their highest and most active. progesteronelevels highestrogen levelsconsistently riseluteinizinghormone levelshighdeveloping follicleoocytemature egg

Find the equation of the line passing through the point (–1, 5) and perpendicular to the line 3x + y = 4.