Q: Answer the following question given this paragraph: The other ammonium ions are changed into nitrogen gas by denitrifying bacteria. Q: The other ammonium ions are changed into nitrogen gas by what? Choices: - fluctuations bacteria - fungi - accompanying bacteria - denitrifying bacteria A:
A: denitrifying bacteria

Q: Answer the following question given this paragraph: Figure 5.2 Layers of Skin The skin is composed of two main layers: the epidermis, made of closely packed epithelial cells, and the dermis, made of dense, irregular connective tissue that houses blood vessels, hair follicles, sweat glands, and other structures. Beneath the dermis lies the hypodermis, which is composed mainly of loose connective and fatty tissues. Q: The epidermis is made of which closely packed cells? Choices: - cancer cells - nerve cells - muscle cells - epithelial cells A:
A: epithelial cells

Q: Answer the following question given this paragraph: Some of the pollutants from fossil fuels can be filtered out of exhaust before it is released into the air. Other pollutants can be changed to harmless compounds before they are released. Two widely used technologies are scrubbers and catalytic converters. Q: A catalytic converter filters pollutants in exhaust created by burning what before releasing it into the air? Choices: - carbon dioxide - noble gas - fossil compounds - fossil fuels A:
A: fossil fuels

Q: Answer the following question given this paragraph: Relief , or terrain, includes all the landforms of a region. A topographic map shows the height, or elevation , of features in an area. This includes mountains, craters, valleys, and rivers. For example, Figure below shows the San Francisco Peaks in northern Arizona. Features on the map include mountains, hills and lava flows. You can recognize these features from the differences in elevation. We will talk about some different landforms in the next section. Q: What type of map shows the elevation and features in an area? Choices: - geographic - meteorological - gradient - topographic A:
A: topographic