Plate tectonic theory states that the continents move around on the earth's crust, drifting in response to forces within the earth's mantle. what generalization would be true if plate tectonic theory is accurate? dinosaur fossils can be found on all of the earth's continents in approximately equal proportions. all of the continents have organisms with similar adaptations living in similar environments. animals located throughout the continents could have evolved from a single common ancestor. fossils of the same species can be found on different continents that are separated by oceans

Embryonic stem cells are cells derived from an embryo. these cells can be used to create new tissues for patients suffering from certain illnesses and disorders. which statement best summarizes why the use of embryonic stem cells could be seen as unethical? a. some people consider embryos to possess rights equal to those of fully developed human beings. b. extracting stem cells from embryos is a very energy-intensive process, which consumes resources that could be used elsewhere. c. embryos are difficult to obtain, so the monetary cost of using them for research outweighs their benefit. d. the process of extracting stem cells from embryos generates biohazardous waste that cannot be safely disposed of.