What is the main cause of urban migration in the United States? a. Rural communities are no longer necessary.
b. Urban dwelling provides better access to goods, services, and jobs.
c. Urban communities reduce human impact on the environment.
d. Rural communities are unable to support life in the long-term. .

Acladogram is a branching diagram that represents suggested evolutionary relationships among organisms based on the presence of unique traits. a scientist discovers a new organism that lacks limbs and does not have a true backbone. the organism lays eggs to produce offspring and has a cartilage-like rod known as a notochord running along its dorsal surface. on the cladogram below, select the species to which the newly discovered organism is most closely related.

Why is earth's outer core hotter than earth’s oceanic crust? earth’s oceanic crust is denser than earth’s outer core is. earth’s oceanic crust has lava flowing from the mantle. earth’s outer core has a composition of solid iron and nickel. earth’s outer core is deeper within earth than oceanic crust is.

Which two criteria must be met before scientist can use radiocarbon dating? explain your answer