Answer the following question given this paragraph: The cardiovascular system is the system of organs that delivers blood to all the cells of the body. It's like the body's lifeline. Without the cardiovascular system circulating your blood, you couldn't survive. Q: What system of organs delivers blood to all cells of the body? Choices: - gastrointestinal - respiratory - integumentary - cardiovascular A:
cardiovascular
(Question)
Answer the following question given this paragraph: A mutation is a change in the base sequence of DNA or RNA. Environmental causes of mutations are called mutagens. The effects of a mutation depend on the type of mutation and whether it occurs in a gamete or body cell. Q: What is the term for environmental causes of mutations? Choices: - pollutants - catalysts - carcinogens - mutagens A:
(Answer)
mutagens
Ques: Answer the following question given this paragraph: Light also behaves like a package of energy. It turns out that for light, the energy of the "package" of energy is proportional to its frequency. (For most waves, energy is proportional to wave amplitude, or the height of the wave. ) The mathematical equation that relates the energy (E) of light to its frequency is. Q: For most waves, energy is proportional to what, a term that describes the height of the wave? Choices: - wave frequency - wave volume - wave threshold - wave amplitude A:
Ans: wave amplitude
(Q).
Answer the following question given this paragraph: Cholesterol has been implicated in heart disease for decades. Atherosclerosis is a disorder of the arteries in which cholesterol and other materials are deposited on the interior of the arterial wall. These deposits lead to the formation of plaques that can restrict or even block the flow of blood through these blood vessels (see Figure below ). A decrease in the flow of blood can lead to high blood pressure and a lowered oxygen supply to the heart muscle. A complete blockage of blood flow to parts of the heart (a heart attack) can cause significant damage due to oxygen deprivation, in some cases leading to death. Q: What is the name of the disorder of the arteries in which cholesterol and other materials are deposited on the interior of the arterial wall? Choices: - arthritis - anemia - paralysis - atherosclerosis A:
(A).
atherosclerosis
Ques:Answer the following question given this paragraph: External forces are forces that act on the system from outside. In our previous example, external forces include the force of gravity acting on both cars (because the other part of the force pair, the pull of gravity the Earth experiences coming from the cars, is not included in the system) and the forces of friction between the tires and the road. Q: What do we call forces that act on the system from outside? Choices: - material - internal - static - external A:

Ans:external
Answer the following question given this paragraph: The human body has as many as two trillion lymphocytes, and lymphocytes make up about 25% of all leukocytes. The majority of lymphocytes are found in the lymphatic system, where they are most likely to encounter pathogens. The rest are found in the blood. There are two major types of lymphocytes, called B cells and T cells. These cells get their names from the organs in which they mature. B cells mature in bone marrow, and T cells mature in the thymus. Both B and T cells recognize and respond to particular pathogens. Q: The human body has as many as two trillion lymphocytes, and lymphocytes make up about 25% of all of what? Choices: - red blood cells - pathogens - glands - leukocytes A:
leukocytes