Answer the following question given this paragraph: During late adulthood, people are not as physically able. For example, they usually have less muscle and slower reflexes. Their immune system also doesn't work as well as it used to. As a result, they have a harder time fighting diseases like the flu. The risk of developing diseases such as heart disease and cancer continues to rise. Arthritis is also common. In arthritis, joints wear out and become stiff and painful. As many as one in four late adults may develop Alzheimer's disease. In this disease, brain changes cause mental abilities to decrease. Q: What is it called when your joints start to wear out and they become stiff and painful? Choices: - adenitis - endometriosis - tendonitis - arthritis A:
arthritis
Answer the following question given this paragraph: All plants have a characteristic life cycle that includes alternation of generations. Asexual reproduction with spores produces a haploid gametophyte generation. Sexual reproduction with gametes and fertilization produces a diploid sporophyte generation. Q: Alternation of generations is characteristic of the life cycle of all what? Choices: - cells - animals - organs - plants A:
plants
Q: Answer the following question given this paragraph: A large log placed in a fire will burn relatively slowly. If the same mass of wood were added to the fire in the form of small twigs, they would burn much more quickly. This is because the twigs provide a greater surface area than the log does. An increase in the surface area of a reactant increases the rate of a reaction. Surface area is larger when a given amount of a solid is present as smaller particles. A powdered reactant has a greater surface area than the same reactant as a solid chunk. In order to increase the surface area of a substance, it may be ground into smaller particles or dissolved into a liquid. In solution, the dissolved particles are separated from each other and will react more quickly with other reactants. Q: Why does a large log burn relatively slowly compared to the same mass of wood in the form of small twigs? Choices: - smaller blade area - larger surface area - larger surface area - smaller surface area A:
A: smaller surface area
Question: Answer the following question given this paragraph: The polymerase chain reaction is a way of making copies of a gene. It uses high temperatures and an enzyme to make new DNA molecules. The process keeps cycling to make many copies of a gene. Q: The polymerase chain reaction is a way of making copies of what? Choices: - an enzyme - a method - a form - a gene A:
Answer: a gene
*Question*
Answer the following question given this paragraph: Core electrons are the electrons that are closer to the nucleus and therefore do not participate in bonding. Q: Because core electrons are closer to the nucleus, they are not involved in what? Choices: - diffusion - splitting - fission - bonding A:
**Answer**
bonding
Q: Answer the following question given this paragraph: hydrophilic heads are directed outward, in contact with the water. Each micelle may contain thousands of lipid molecules. Polar lipids may also form a monolayer, a layer one molecule thick on the surface of the water. The polar heads face into water, and the nonpolar tails stick up into the air. Bilayers are double layers of lipids arranged so that the hydrophobic tails are sandwiched between an inner surface and an outer surface consisting of hydrophilic heads. The hydrophilic heads are in contact with water on either side of the bilayer, whereas the tails, sequestered inside the bilayer, are prevented from having contact with the water. Bilayers like this make up every cell membrane (Figure 17.6 "Schematic Diagram of a Cell Membrane"). Figure 17.5 Spontaneously Formed Polar Lipid Structures in Water: Monolayer, Micelle, and Bilayer. Q: When something is described as "hydrophilic", you can determine something about how it interacts with what? Choices: - hydrogen - air - iron - water A:
A: water