Which of the following human activities could have an irreversible effect on an ecosystem? I. introducing a new species
II. urban sprawl
III. introducing a new chemical
IV. over-hunting

Should the government in china restrict the rights to the media/social media? why or why not?

The tea party movement is a. an official third party that challenges both democrats and republicans in national elections. b. an organized challenge to incumbents in the republican party by the most conservative wing of the republican party. c. an organized challenge to incumbents in the democratic party by the most liberal wing of the democratic party. d. an offspring of the green party that runs for state and local office in many midwestern states. e. the now defunct party that gave way to the republican party at the end of the “second party system.”

People of french origin make up about of the canadian population. 23 percent 50 percent 1 percent 76 percent