How do index fossils scientists? a. they aid in the study of ranges of different organisms. b. they advance understanding of the origin of life on earth. c. they aid in comparison of rock layers at distant locations. d. they advance understanding of rock type at the time the organism lived.

C. They aid in comparison of rock layers at distant locations

Explanation: Using the law of superposition, scientists can tell the relative age of the rock layer by the age of the species of the fossils that reside in the rock laters.

C

Explanation:

They aid in comparison of rock layers at distant locations.

the national environmental policy act (nepa) is a united states environmental law that promotes the enhancement of the environment and established the president's council on environmental quality (ceq). the law was enacted on january 1, 1970. to date, more than 100 nations around the world have enacted national environmental policies modeled after nepa.

lizards have adapted to life in the desert. some desert lizards have toes with spiny scales to them run across the sand without sinking. some use the sand to hide from predators, or to search for small animals that they prey upon.