The reproductive system, sperm development, fetal development, and bone remodeling are highly dependent on which vitamin

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

Long-period comets come from the oort cloud particles in earth’s atmosphere material from the asteroid belt the kuiper belt

About how many years does it take for one cycle of surface water to become deep water and then surface water again in the oceans? 101001,000