Paleontologists have discovered several ancestors of the modern horse. Based on the skeleton, the skull, and the leg bones, which fossil is the oldest?

Which fossil is most like a modern horse?

In order from largest to smallest what are earths five main oceans

Which characteristics of temperature and salinity have the greatest influence on the movement of deep-ocean currentsa. warm and low salinityb. cold and high salinityc. cold and low salinityd. warm and high salinity

In russia which of these challenges affects the transportation of both petroleum products and other goods? a poorly repaired roads b harsh weather and vast distances c frozen waterways d separatist movements