Index fossils found in rocks can be used to help determine the rock's age, because index fossils are fossils of species that .
a changed their diets
b hid in marine sediments
c migrated to different environments
d quickly became extinct

How can health insurance increase life expectancy

Drag the tiles to the correct boxes to complete the pairs. match the stages to their features. low birth rates, death rates are constant high birth rate, and death rate high birth rate and low death rate pre-modern mature industrial industrialization

What is a problem natives in both bolivia and peru face? a. extreme poverty c. discrimination b. limited access to resources d. all of the above