Which of the following are natural causes of acid rain? a) volcano emissions, lightning, and microbial processesb) industrial emissions and other man-made pollutersc) smokestacks and volcano emissions d) microbial processes and fuel combustionthe answer was "a"

Which of these is least likely to be an adaption? a. a mouse digs a hole to hide from predators. b. a snake bites its prey to deliver it deadly venom. c.a jackrabbit has large ears that it release body heat. d.a parrot learns to say its owner's name.

The european union was formally established in

Which of the following events did not occur as a result of china’s open-door policy? a. trade between japan and china was encouraged. b. all countries were given equal access to chinese ports. c. foreign influence in china increased. d. the influence of the communist party weakened.