What causes precipitations at front . "a" rising cold air. "b" rising warm air."c" increasing air pressure."d" increasing temperature.

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

The kind of fertilization found in the majority of aquatic animals is (internal or external) fertilization.

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above