Ques: Q: Another measure of the effectiveness of a machine is its what? Read this paragraph and choose the correct option from the provided answers: Another measure of the effectiveness of a machine is its mechanical advantage. Mechanical advantage is the number of times a machine multiplies the input force. It can be calculated with the equation:. Choices: - aesthetic effect - cost benefit - chemical advantage - mechanical advantage A:
Ans: mechanical advantage

Ques: Q: A sequence of amino acids in single polypeptide is the primary structure for what? Read this paragraph and choose the correct option from the provided answers: Protein Structure. Primary protein structure is the sequence of amino acids in a single polypeptide. Secondary protein structure refers to internal shapes, such as alpha helices and beta pleated sheets, that a single polypeptide takes on due to bonds between atoms in different parts of the polypeptide. Tertiary protein structure is the overall three-dimensional shape of a protein consisting of one polypeptide. Quaternary protein structure is the shape of a protein consisting of two or more polypeptides. For a brief animation of protein structure, see www. stolaf. edu/people/giannini/flashanimat/proteins/protein%20structure. swf . Choices: - lipids - cells - dna - proteins A:
Ans: proteins

Ques: Q: What are two basic types of pollutants in the air? Read this paragraph and choose the correct option from the provided answers: There are two basic types of pollutants in air. They are known as primary pollutants and secondary pollutants. Choices: - smog and coal - organic and inorganic - pesticides and smog - primary and secondary pollutants A:
Ans: primary and secondary pollutants

Ques: Q: Nails cover the tips of what? Read this paragraph and choose the correct option from the provided answers: Nails are similar to claws in other animals. They cover the tips of fingers and toes. Fingernails and toenails both grow from nail beds. As the nail grows, more cells are added at the nail bed. Older cells get pushed away from the nail bed and the nail grows longer. There are no nerve endings in the nail. Otherwise cutting your nails would hurt a lot!. Choices: - lips and teeth - fingers and lips - ribs and nerves - fingers and toes A:
Ans:
fingers and toes