Answer the following question given this paragraph: The cut on your hand may become red, warm, and swollen. These are signs of an inflammatory response. This is the first reaction of the body to tissue damage or infection. As explained in Figure below , the response is triggered by chemicals called cytokines and histamines , which are released when tissue is injured or infected. The chemicals communicate with other cells and coordinate the inflammatory response. You can see an animation of the inflammatory response at this link: http://www. sumanasinc. com/webcontent/animations/content/inflammatory. html . Q: The first reaction of the body to tissue damage or infection is called the what response? Choices: - defensive - harmful - retaliatory - inflammatory A:
inflammatory
(Question)
Answer the following question given this paragraph: Q: What is a common name for the descriptive hypothesis that help to understand patterns of descent? Choices: - genetic trees - genetic order - gene mapping - evolutionary trees A:
(Answer)
evolutionary trees
Ques: Answer the following question given this paragraph: Note The first controlled chain reaction was achieved on December 2, 1942, in an experiment supervised by Enrico Fermi in a laboratory underneath the football stadium at the University of Chicago. Although fairly simple in theory, an atomic bomb is difficult to produce, in part because uranium-235, the isotope that undergoes fission, makes up only 0.7% of natural uranium; the rest is mostly uranium-238, which does not undergo fission. (Remember that the radioactive process that a nucleus undergoes is characteristic of the isotope. ) To make uranium useful for nuclear reactors, the uranium in uranium-235 must be enriched to about 3%. Enrichment of uranium is a laborious and costly series of physical and chemical separations. To be useful in an atomic bomb, the uranium in uranium-235 must be enriched to 70% or more. At lesser concentrations, the chain reaction cannot sustain itself, so no explosion is produced. Fusion is another nuclear process that can be used to produce energy. In this process, smaller nuclei are combined to make larger nuclei, with an accompanying release of energy. One example is the hydrogen fusion, which makes helium. While the steps of the process are complicated, the net reaction is: 41H 4He + 2.58 1012 J Saylor URL: http://www. saylor. org/books. Q: Fusion is another nuclear process that can be used to produce energy. in this process, smaller nuclei are combined to make larger nuclei, with an accompanying release of this? Choices: - food - mineral - cells - energy A:
Ans: energy
(Q).
Answer the following question given this paragraph: Electromagnetic waves differ in their wavelengths and frequencies. The higher the frequency of an electromagnetic wave, the greater its energy. The speed of an electromagnetic wave is the product of its wavelength and frequency, so a wave with a shorter wavelength has a higher frequency, and vice versa. Q: The speed of an electromagnetic wave is the product of its wavelength and what else? Choices: - height - resonance - density - frequency A:
(A).
frequency
Ques:Answer the following question given this paragraph: Because acceleration is velocity in m/s divided by time in s, the SI units for acceleration are m/s 2 , meters per second squared or meters per second per second, which literally means by how many meters per second the velocity changes every second. Recall that velocity is a vectorit has both magnitude and direction. This means that a change in velocity can be a change in magnitude (or speed), but it can also be a change in direction. For example, if a car turns a corner at constant speed, it is accelerating because its direction is changing. The quicker you turn, the greater the acceleration. So there is an acceleration when velocity changes either in magnitude (an increase or decrease in speed) or in direction, or both. Acceleration as a Vector Acceleration is a vector in the same direction as the change in velocity, v . Since velocity is a vector, it can change either in magnitude or in direction. Acceleration is therefore a change in either speed or direction, or both. Keep in mind that although acceleration is in the direction of the change in velocity, it is not always in the direction of motion. When an object slows down, its acceleration is opposite to the direction of its motion. This is known as deceleration. Q: Velocity is a vector that has both direction and what? Choices: - variable - latitude - radiation - magnitude A:

Ans:magnitude
Ques:Answer the following question given this paragraph: RNA, the other nucleic acid. RNA has many important functions, especially during protein synthesis. And what allows it to be involved in protein synthesis is its ability to fold into three-dimensional structures, giving the molecule specific functions. This structure depicts an RNA molecule. the numerous secondary structures, such as the helices, are visible. Q: Rna is especially important during synthesis of what? Choices: - glucose - mitochondria - sulfur - protein A:

Ans:
protein