Ques: Q: Another measure of the effectiveness of a machine is its what? 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? Choices: - lipids - cells - dna - proteins A:
Ans: proteins

Ques: Q: What are two basic types of pollutants in the air? 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? Choices: - lips and teeth - fingers and lips - ribs and nerves - fingers and toes A:
Ans:
fingers and toes