39 Which statements explain what happens at deep-ocean trenches? Check two that apply.
A Crust is formed.
B Mountains are formed
Seafloor spreading occurs.
D Crust is subducted back into the mantle and turned into molten rock
E Denser plates slide under lighter plates

Zoo geographic regions are characterized by the presence of specific groups of animals these regions are determined by the taxonomic or phylogenetic relationships of animals. the map shows the zoogeographic regions proposed by the naturalist alfred russel wallace in 1876. the similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between the organisms in both locations ?

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.

Which of the following is not a technology that can be used to conserve resources? a. hydropower b. volcanic power c. natural gas d. geothermal select the best answer from the choices provided a b c d