Answer the following question given this paragraph: The oxidation of an alcohol can produce either an aldehyde or a ketone. Ethanol can be oxidized in the laboratory through a heating process combined with the addition of an oxidizing agent such as the dichromate ion, which catalyzes the reaction in an acidic solution. The reaction produces the aldehyde ethanal (acetaldehyde). Q: The oxidation of an alcohol can produce either an aldehyde or what? Choices: - enzyme - amine - ester - ketone A:
ketone
(Question)
Answer the following question given this paragraph: The theory of evolution by natural selection was proposed at about the same time by both Charles Darwin and Alfred Russel Wallace, shown in Figure below , and was set out in detail in Darwin's 1859 book On the Origin of Species . Natural selection is a process that causes heritable traits that are helpful for survival and reproduction to become more common, and harmful traits, or traits that are not helpful or advantageous for survival to become more rare in a population of organisms. This occurs because organisms with advantageous traits are more "fit" to survive in a particular environment and have "adapted" to the conditions of that environment. These individuals will have greater reproductive success than organisms less fit for survival in the environment. This will lead to an increase in the number of organisms with the advantageous trait(s) over time. Over many generations, adaptations occur through a combination of successive, small, random changes in traits, and natural selection of those variants best-suited for their environment. Natural selection is one of the cornerstones of modern biology. Q: What is the method of evolution by which advantageous heritable traits become more common over generations? Choices: - artificial selection - same selection - flow selection - natural selection A:
(Answer)
natural selection
Ques: Answer the following question given this paragraph: A rock under enough stress will fracture. There may or may not be movement along the fracture. If there is not movement, the fracture is a joint. If there is movement, the fracture is a fault. Q: What will happen to a rock when it's under tremendous stress? Choices: - it will slow - it will solidify - it will rebound - it will fracture A:
Ans: it will fracture
(Q).
Answer the following question given this paragraph: The tennis player in Figure below has really worked up a sweat. Do you know why we sweat? Sweating helps to keep us cool. When sweat evaporates from the skin, it uses up some of the body's heat energy. Sweating is one of the ways that the body maintains a stable internal environment. It helps keep the body's internal temperature constant. When the body's internal environment is stable, the condition is called homeostasis . Q: What is it called when body's internal environment is stable? Choices: - synchronicity - hypothesis - ketosis - homeostasis A:
(A).
homeostasis
Ques:Answer the following question given this paragraph: There are some properties that all liquids have. The liquid that we are most familiar with is probably water, and it has these properties. Other liquids have them as well, which is something to keep in mind. All liquids have a certain portion of their particles having enough energy to enter the gas phase, and if these particles are at the surface of the liquid, they do so ( - ball-ch10_s03_f01). The formation of a gas from a liquid at temperatures below the boiling point is called evaporation. At these temperatures, the material in the gas phase is called vapor, rather than gas; the term gas is reserved for when the gas phase is the stable phase. Figure 10.5 Evaporation. Q: What do we call the formation of a gas from a liquid at temperatures below the boiling point? Choices: - melting - pulverization - steaming - evaporation A:

Ans:evaporation
Ques: Answer the following question given this paragraph: The electric current is measured in coulombs per second. A flow of one coulomb per second is called one ampere, A, of current. Q: A flow of one coulomb per second is called one ampere, which is a measure of what? Choices: - Direct current - powered current - performance current - electric current A:
Ans:
electric current