Question: Question: "What is the use of fungus Aspergillus niger?" Context: "Chromobacterium violaceum and Pseudomonas fluorescens can both mobilize solid copper, as a cyanide compound. The ericoid mycorrhizal fungi associated with Calluna, Erica and Vaccinium can grow in copper metalliferous soils. The ectomycorrhizal fungus Suillus luteus protects young pine trees from copper toxicity. A sample of the fungus Aspergillus niger was found growing from gold mining solution; and was found to contain cyano metal complexes; such as gold, silver, copper iron and zinc. The fungus also plays a role in the solubilization of heavy metal sulfides." Answer:
Answer: solubilization of heavy metal sulfides

Question: Question: "What has 750,000 square miles of ocean?" Context: "The islands are located about halfway between Hawaii and Australia, north of Nauru and Kiribati, east of the Federated States of Micronesia, and south of the U.S. territory of Wake Island, to which it lays claim. The atolls and islands form two groups: the Ratak (sunrise) and the Ralik (sunset). The two island chains lie approximately parallel to one another, running northwest to southeast, comprising about 750,000 square miles (1,900,000 km2) of ocean but only about 70 square miles (180 km2) of land mass. Each includes 15 to 18 islands and atolls. The country consists of a total of 29 atolls and five isolated islands." Answer:
Answer: The two island chains

Question: Question: "How much is the average one room Bern apartment in USD?" Context: "As of 2003[update] the average price to rent an average apartment in Bern was 1108.92 Swiss francs (CHF) per month (US$890, 500, 710 approx. exchange rate from 2003). The average rate for a one-room apartment was 619.82 CHF (US$500, 280, 400), a two-room apartment was about 879.36 CHF (US$700, 400, 560), a three-room apartment was about 1040.54 CHF (US$830, 470, 670) and a six or more room apartment cost an average of 2094.80 CHF (US$1680, 940, 1340). The average apartment price in Bern was 99.4% of the national average of 1116 CHF. The vacancy rate for the municipality, in 2010[update], was 0.45%." Answer:
Answer:
US$500