Answer the following question given this paragraph: The product of a wave's wavelength () and its frequency (), , is the speed of the wave. Thus, for electromagnetic radiation in a vacuum: c = 2.998 10 8 ms 1 = Wavelength and frequency are inversely proportional: As the wavelength increases, the frequency decreases. The inverse proportionality is illustrated in Figure 6.3. This figure also shows the electromagnetic spectrum, the range of all types of electromagnetic radiation. Each of the various colors of visible light has specific frequencies and wavelengths associated with them, and you can see that visible light makes up only a small portion of the electromagnetic spectrum. Because the technologies developed to work in various parts of the electromagnetic spectrum are different, for reasons of convenience and historical legacies, different units are typically used for different parts of the spectrum. For example, radio waves are usually specified as frequencies (typically in units of MHz), while the visible region is usually specified in wavelengths (typically in units of nm or angstroms). Q: The product of a wave's wavelength and its frequency is what? Choices: - trough - velocity - amplitude - speed A:
speed
(Question)
Answer the following question given this paragraph: Lipids are organic compounds that contain mainly carbon, hydrogen, and oxygen. They include substances such as fats and oils, as well as waxes, sterols, some vitamins (A, D, E and K) and phospholipids. Lipid molecules consist of fatty acids, with or without additional molecules. Fatty acids are organic compounds that have the general formula CH 3 (CH 2 ) n COOH, where n usually ranges from 2 to 28 and is always an even number. Q: What elements do lipids primarily consist of? Choices: - silicon, hydrogen , and oxygen - iron, hydrogen , and oxygen - helium, hydrogen , and oxygen - carbon, hydrogen, and oxygen A:
(Answer)
carbon, hydrogen, and oxygen
Ques: Answer the following question given this paragraph: The Cytoplasm The cytoplasm comprises the contents of a cell between the plasma membrane and the nuclear envelope (a structure to be discussed shortly). It is made up of organelles suspended in the gel-like cytosol, the cytoskeleton, and various chemicals (Figure 3.7). Even though the cytoplasm consists of 70 to 80 percent water, it has a semi-solid consistency, which comes from the proteins within it. However, proteins are not the only organic molecules found in the cytoplasm. Glucose and other simple sugars, polysaccharides, amino acids, nucleic acids, fatty acids, and derivatives of glycerol are found there too. Ions of sodium, potassium, calcium, and many other elements are also dissolved in the cytoplasm. Many metabolic reactions, including protein synthesis, take place in the cytoplasm. Q: What comprises the contents of a cell between the plasma membrane and the nuclear envelope? Choices: - protoplasm - cerebellum - cytoskeleton - cytoplasm A:
Ans: cytoplasm
(Q).
Answer the following question given this paragraph: Chemical reactions that consume energy are called endothermic reactions . Energy is usually absorbed from the surroundings as heat. An example is the synthesis of ammonia, described above. In organisms, endothermic reactions are called anabolic reactions . Anabolic reactions construct molecules from smaller units. An example is the synthesis of proteins from amino acids. Endothermic reactions can be represented by the general chemical equation:. Q: Chemical reactions that consume energy are called what? Choices: - exothermic reactions - inefficient reactions - greedy reactions - endothermic reactions A:
(A).
endothermic reactions
Ques:Answer the following question given this paragraph: For natural selection to take place, organisms must vary in their traits. Asexual reproduction results in offspring that are all the same. They are also identical to the parent cell. So how can prokaryotes increase genetic variation? They can exchange plasmids. This is called genetic transfer . It may happen by direct contact between cells. Or a "bridge" may form between cells. Genetic transfer mixes the genes of different cells. It creates new combinations of alleles. Q: What is the exchange of plasmids by prokaryotes called? Choices: - biochemical transfer - artificial transfer - transcription - genetic transfer A:

Ans:genetic transfer
Ques: Answer the following question given this paragraph: There are two different types of immune responses. Both types involve lymphocytes. However, one type of response involves B cells. The other type involves T cells. Q: What type of systemic response involves lymphocytes? Choices: - natural - chronic - inflammation - immune A:
Ans:
immune