4. lystrosaurus was a slow-moving, plant-eating reptile that lived over 250 million years ago. fossils of lystrosaurus have been found
in the brown areas shown below. how is this explained by the existence of pangaea?

How do you date a sample of rock that you suspect as being one of the earliest on earth

Fa child has tay sach's disease, what would her parents' genotypes be? a) her father is heterozygous; her mother is heterozygous. b) her father is heterozygous; her mother is homozygous dominant. c) her father is homozygous dominant; her mother is homozygous dominant. d) her father is homozygous dominant; her mother is homozygous recessive.

What causes the retrograde motion of mars? a.) mars passes earth since it orbits the sun faster b.) mars moves backwards in its orbit for a brief time c.) earth moves slower when it approaches mars in its orbit d.) earth passes mars in its orbit since it orbits the sun faster