[Q]: Two twin sisters, Bianca and Rosa, were exposed to high levels of air pollution. While Bianca was exposed mostly to indoor pollution, Rosa was heavily exposed to outdoor pollution. Which sister was more exposed to air pollution because of cutting heating costs?
****
[A]: Bianca

[Q]: Timber village started a channelization process by draining all the swamps near their village. Hill village situated 10 miles to the south, left their swamps untouched. Which village had more swamps near it?
****
[A]: Hill

[Q]: Two students learned about respiratory systems in animals. Dana learned more about mammalian lungs, while Barry learned more about the lungs of birds. Which student learned less about surface area for gas exchange between the lungs and bloodstream?
****
[A]: Barry

[Q]: Microbiologist John is studying the anaerobic organism. He collected two samples of this organism, sample A and sample B. Sample A is an anaerobic organism, and sample B is specifically identified as the Clostridium perfringens obligate anaerobe. To compare these samples to other organisms he collected another microbe that is not an anaerobic organism. He labeled it as sample C. Which sample might not die in presence of oxygen, sample A or sample C?
****
[A]:
sample C