Rocks formed from small pieces of rocks or shells that have been laid down in layers and pressed together are called a. metamorphic rocks b. igneous rocks c. magmas d. sedimentary rocks

Read the following scenario to answer the following question. in some zoos, rare crosses between a male lion and a female tiger have produced hybrid offspring called "ligers." male ligers are sterile but some female ligers are fertile. in the wild, lion and tiger ranges do not naturally overlap, making such a cross unlikely. furthermore, the solitary behavior of tigers and the social organizations of lions create behavioral differences. applying the biological species concept, the sterility of ligers reveals that a. lions are probably a subspecies of tigers b. tigers and lions are the same species c. a new species called "ligers" is forming d. tigers and lions are separate species

Which phase of the cell cycle ensures that identical copies of the dna are made for daughter cells?

(amoeba sisters video recap: pedigrees and need