Which phrases are true of only the mantle? check all that apply.
made of three layers
has a tarry layer
made of two layers
has a molten outer layer
has a solid outer layer

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

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The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions