Answer the following question given this paragraph: Bacterial contamination in our food often makes the news. There are many bacteria present on raw food, especially raw meat. Campylobacter (pictured above), salmonella, and other microorganisms can be found, even after cooking if the meat has not been sufficiently exposed to the heat. Ionizing radiation can be used to disrupt the DNA-RNA-protein synthesis cycle that allows the bacteria to reproduce. Cobalt-60 is a common radiation source, as is cesium-137. But, just to be safe, order that burger well-done. Q: What kind of radiation can be used to disrupt the dna-rna protein synthesis cycle that allows bacteria to reproduce? Choices: - microwave - non-ionizing - infrared - ionizing A:
ionizing
Answer the following question given this paragraph: The color of a material is due to the ability of its atoms to absorb certain wavelengths while reflecting or reemitting others. A simple red material, for example a tomato, absorbs all visible wavelengths except red. This is because the atoms of its hydrocarbon pigment (lycopene) have levels separated by a variety of energies corresponding to all visible photon energies except red. Air is another interesting example. It is transparent to visible light, because there are few energy levels that visible photons can excite in air molecules and atoms. Visible light, thus, cannot be absorbed. Furthermore, visible light is only weakly scattered by air, because visible wavelengths are so much greater than the sizes of the air molecules and atoms. Light must pass through kilometers of air to scatter enough to cause red sunsets and blue skies. Q: What weakly scatters visible light? Choices: - space - Reflection - water - air A:
air
Q: Answer the following question given this paragraph: 19.2 Cardiac Muscle and Electrical Activity The heart is regulated by both neural and endocrine control, yet it is capable of initiating its own action potential followed by muscular contraction. The conductive cells within the heart establish the heart rate and transmit it through the myocardium. The contractile cells contract and propel the blood. The normal path of transmission for the conductive cells is the sinoatrial (SA) node, internodal pathways, atrioventricular (AV) node, atrioventricular (AV) bundle of His, bundle branches, and Purkinje fibers. The action potential for the conductive cells consists of a prepotential phase with a slow influx of Na+ followed by a rapid influx of Ca2+ and outflux of K+. Contractile cells have an action potential with an extended plateau phase that results in an extended refractory period to allow complete contraction for the heart to pump blood effectively. Recognizable points on the ECG include the P wave that corresponds to atrial depolarization, the QRS complex that corresponds to ventricular depolarization, and the T wave that corresponds to ventricular repolarization. Q: The conductive cells within the heart establish the heart rate and transmit it through the what? Choices: - meiosis - conduction - neurons - myocardium A:
A: myocardium
Question: Answer the following question given this paragraph: Movable joints are also known as synovial joints . This is because the space between the bones is filled with a thick fluid, called synovial fluid , that cushions the joint (see Figure below ). Q: What is another term for movable joints? Choices: - interstitial - fibrous - sesamoidal - synovial A:
Answer: synovial
*Question*
Answer the following question given this paragraph: An example of a chemical reaction is the burning of methane. In this chemical reaction, the reactants are methane (CH 4 ) and oxygen (O 2 ), and the products are carbon dioxide (CO 2 ) and water (H 2 O). A chemical reaction involves the breaking and forming of chemical bonds. When methane burns, bonds break in the methane and oxygen molecules, and new bonds form in the molecules of carbon dioxide and water. Q: Burning of methane is a type of what, which involves the breaking and forming of bonds? Choices: - liquid reaction - physical reaction - toxic reaction - chemical reaction A:
**Answer**
chemical reaction
(Q).
Answer the following question given this paragraph: Light may be absorbed by matter. This is called absorption of light. When light is absorbed, it doesn't reflect from or pass through matter. Instead, its energy is transferred to particles of matter, which may increase the temperature of matter. Q: When light is absorbed by a material, what may increase? Choices: - happiness - weight - mass - its temperature A:
(A).
its temperature