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Q: In birds, modified front legs are actually what? Read this paragraph and choose the correct option from the provided answers: Wings are an obvious adaptation for flight. They are actually modified front legs. Birds move their wings using muscles in the chest. These muscles are quite large, making up as much as 35 percent of a bird's body weight. Choices: - tails - arms - claws - wings A:
(Answer)
wings

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Q: The cell theory and the theory of evolution by natural selection are basic to all fields in what branch of science? Read this paragraph and choose the correct option from the provided answers: Each field of life science has its own specific body of knowledge and relevant theories. However, two theories are basic to all of the life sciences. They form the foundation of every life science field. They are the cell theory and the theory of evolution by natural selection. Both theories have been tested repeatedly. Both are supported by a great deal of evidence. Choices: - rock science - zoology - chemistry - life science A:
(Answer)
life science

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Q: What is defined in physics as the amount of force pushing against a given area? Read this paragraph and choose the correct option from the provided answers: Particles of gas are constantly moving in all directions at random. As a result, they are always bumping into each other and other things. This is modeled in the Figure below . The force of the particles against things they bump into creates pressure. Pressure is defined in physics as the amount of force pushing against a given area. How much pressure a gas exerts depends on the number of gas particles in a given space and how fast they are moving. The more gas particles there are and the faster they are moving, the greater the pressure they create. To learn more about gas pressure and how to measure it, go to this URL: http://www. wisc-online. com/objects/ViewObject. aspx?ID=GCH5004 . Choices: - energy - gravity - resistance - pressure A:
(Answer)
pressure