(Q).
Answer the following question given this paragraph: The mechanical advantage of a simple machine such as a pulley is the factor by which the machine changes the force applied to it. The ideal mechanical advantage of a machine is its mechanical advantage in the absence of friction. All machines must overcome friction, so the ideal mechanical advantage is always somewhat greater than the actual mechanical advantage of the machine as it is used in the real world. Q: What is something that all machines must overcome? Choices: - stress - work - temperature - friction A:
(A).
friction

(Q).
Answer the following question given this paragraph: Mitosis and meiosis are two types of cell division, with dramatically different products. Mitosis begins with a diploid somatic cell and ends with two genetically identical diploid cells. Meiosis begins with a diploid cell and produces four haploid genetically unique cells that form gametes. Q: Mitosis and meiosis are two types of what process, with dramatically different products? Choices: - cell transition - cell solution - cell diffusion - cell division A:
(A).
cell division

(Q).
Answer the following question given this paragraph: Q: What part of a plant protects the plant cell, maintains its shape, and prevents excessive uptake of water? Choices: - chloroplasm - stem - root - wall A:
(A).
wall