Problem: The emergence of resistance of bacteria to antibiotics is a common phenomenon. Emergence of resistance often reflects evolutionary processes that take place during antibiotic therapy. The antibiotic treatment may select for bacterial strains with physiologically or genetically enhanced capacity to survive high doses of antibiotics. Under certain conditions, it may result in preferential growth of resistant bacteria, while growth of susceptible bacteria is inhibited by the drug. For example, antibacterial selection for strains having previously acquired antibacterial-resistance genes was demonstrated in 1943 by the LuriaDelbruck experiment. Antibiotics such as penicillin and erythromycin, which used to have a high efficacy against many bacterial species and strains, have become less effective, due to the increased resistance of many bacterial strains.
What is resistance to antibiotics a cause of?
---
Answer: evolution

Problem: Aboriginal peoples in Canada comprise the First Nations, Inuit and Metis; the descriptors "Indian" and "Eskimo" are falling into disuse, and other than in neighboring Alaska. "Eskimo" is considered derogatory in many other places because it was given by non-Inuit people and was said to mean "eater of raw meat." Hundreds of Aboriginal nations evolved trade, spiritual and social hierarchies. The Metis culture of mixed blood originated in the mid-17th century when First Nation and native Inuit married European settlers. The Inuit had more limited interaction with European settlers during that early period. Various laws, treaties, and legislation have been enacted between European immigrants and First Nations across Canada. Aboriginal Right to Self-Government provides opportunity to manage historical, cultural, political, health care and economic control aspects within first people's communities.
What resulted from First Nation and Inuit people marrying European settlers?
---
Answer: The Metis culture

Problem: Most videos enable users to leave comments, and these have attracted attention for the negative aspects of both their form and content. In 2006, Time praised Web 2.0 for enabling "community and collaboration on a scale never seen before", and added that YouTube "harnesses the stupidity of crowds as well as its wisdom. Some of the comments on YouTube make you weep for the future of humanity just for the spelling alone, never mind the obscenity and the naked hatred". The Guardian in 2009 described users' comments on YouTube as:
Some of the positive aspects of youtube might be that it provides what on a scale we've never seen before?
---
Answer:
community and collaboration