Q: What does the coefficient in front of an element in a formula indicate? Read this paragraph and choose the correct option from the provided answers: In chemical equations, reactants and products are represented by chemical symbols and formulas. Numbers called coefficients are placed in front of the symbols and formulas to show how much of each substance is involved in the reaction. Choices: - number of atoms - place on the Periodic Table - time of the reaction - how much is involved in the reaction A:
how much is involved in the reaction

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Q: What's caused by damaged capillaries in the kidneys so the nephrons can no longer filter blood? Read this paragraph and choose the correct option from the provided answers: Untreated diabetes may damage capillaries in the kidneys so the nephrons can no longer filter blood. This is called kidney failure. The only cure for kidney failure is to receive a healthy transplanted kidney from a donor. Until that happens, a patient with kidney failure can be kept alive by artificially filtering the blood through a machine. This is called hemodialysis. You can see how it works in Figure below . Choices: - bacteria failure - sponge failure - colon failure - kidney failure A:
(Answer)
kidney failure

Ques: Q: What is unique and found in all living things because it can form up to four covalent bonds between atoms or molecules? Read this paragraph and choose the correct option from the provided answers: Chapter 2 1 Figure 2.3 Carbon-12 has six neutrons. Carbon-13 has seven neutrons. 3 Figure 2.24 C 4 A 6 C 8 D 10 C 12 D 14 Ionic bonds are created between ions. The electrons are not shared between the atoms, but rather are associated more with one ion than the other. Ionic bonds are strong bonds, but are weaker than covalent bonds, meaning it takes less energy to break an ionic bond compared with a covalent one. 16 Buffers absorb the free hydrogen ions and hydroxide ions that result from chemical reactions. Because they can bond these ions, they prevent increases or decreases in pH. An example of a buffer system is the bicarbonate system in the human body. This system is able to absorb hydrogen and hydroxide ions to prevent changes in pH and keep cells functioning properly. 18 Carbon is unique and found in all living things because it can form up to four covalent bonds between atoms or molecules. These can be nonpolar or polar covalent bonds, and they allow for the formation of long chains of carbon molecules that combine to form proteins and DNA. Choices: - hydrogen - oxygen - potassium - carbon A:
Ans: carbon

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Q: Enzymes in saliva help bread down and digest what? Read this paragraph and choose the correct option from the provided answers: Figure 16.5 (a) Digestion of food begins in the mouth. (b) Food is masticated by teeth and moistened by saliva secreted from the salivary glands. Enzymes in the saliva begin to digest starches and fats. With the help of the tongue, the resulting bolus is moved into the esophagus by swallowing. (credit: modification of work by Mariana Ruiz Villareal). Choices: - starches and water - water and fiber - fiber and minerals - starches and fats A:
(A).
starches and fats

Ques:Q: What is tube-shaped and brings urine from the kidneys to the urinary bladder? Read this paragraph and choose the correct option from the provided answers: Ureters are tube-shaped and bring urine from the kidneys to the urinary bladder. Choices: - gametophytes - vas deferens - fallopian tube - ureters A:

Ans:ureters

Q: When water particles become hot enough to overcome the force of attraction between them, what happens to the water? Read this paragraph and choose the correct option from the provided answers: If water gets hot enough, it starts to boil. Bubbles of water vapor form in boiling water. This happens as particles of liquid water gain enough energy to completely overcome the force of attraction between them and change to the gaseous state. The bubbles rise through the water and escape from the pot as steam. Choices: - it freezes - it pools - it evaporates - it boils A:
it boils