A group of students were investigating the effects of smoking on grass frogs for a research paper. They hypothesized that keeping the frogs in a smoke-filled environment for defined periods of time would result in the animals developing lung cancer. However, when they searched for previously published information to support their hypothesis, they discovered they were wrong in their original assessment. What potential harmful effects could carcinogens from tobacco smoke likely have on the frogs, if not lung cancer

Why should the united state be concerned about air pollution in china?

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

What type of graph presents information about how often certain or traits occur?