Answer the following question given this paragraph: All chemical changes involve a transfer of energy. When zinc reacts with hydrochloric acid, the test tube becomes very warm as energy is released during the reaction. Some other reactions absorb energy. While energy changes are a potential sign of a chemical reaction, care must be taken to ensure that a chemical reaction is indeed taking place. Physical changes may also involve a transfer of energy. A solid absorbs energy when it melts, and the condensation of a gas releases energy. The only way to be certain that a chemical reaction has occurred is to test the composition of the substances after the change has taken place to see if they are different from the starting substances. Q: All chemical changes involve a transfer of what? Choices: - heating - fuel - Water - energy A:
energy
Answer the following question given this paragraph: Q: What is the major selective advantage of myelination? Choices: - heat regulation - potentiation - storage capacity - space efficiency A:
space efficiency
Q: Answer the following question given this paragraph: Empirical formulas can be determined from the percent composition of a compound. In order to determine its molecular formula, it is necessary to know the molar mass of the compound. Chemists use an instrument called a mass spectrometer to determine the molar mass of compounds. In order to go from the empirical formula to the molecular formula, follow these steps:. Q: In order to determine its molecular formula, it is necessary to know what about the compound? Choices: - lipid mass - polar mass - protons mass - molar mass A:
A: molar mass
Question: Answer the following question given this paragraph: Sand is blown up a slope. Gravity pulls it down the other side. This is how dunes migrate. Q: Sand dunes migrate when sand is blown up a slope and this force pulls it down the other side? Choices: - earthquakes - air pressure - spin - gravity A:
Answer: gravity
*Question*
Answer the following question given this paragraph: Glucose and fructose are monosaccharides, or simple sugars. Q: Glucose and fructose are considered this type of sugar? Choices: - alcohols - complex carbohydrates - polysaccharides - monosaccharides, or simple A:
**Answer**
monosaccharides, or simple
(Question)
Answer the following question given this paragraph: Phagocytosis is the process by which large particles, such as cells, are taken in by a cell. For example, when microorganisms invade the human body, a type of white blood cell called a neutrophil removes the invader through this process, surrounding and engulfing the microorganism, which is then destroyed by the neutrophil (Figure 3.26). A variation of endocytosis is called pinocytosis. This literally means "cell drinking" and was named at a time when the assumption was that the cell was purposefully taking in extracellular fluid. In reality, this process takes in solutes that the cell needs from the extracellular fluid (Figure 3.26). A targeted variation of endocytosis employs binding proteins in the plasma membrane that are specific for certain substances (Figure 3.26). The particles bind to the proteins and the plasma membrane invaginates, bringing the substance and the proteins into the cell. If passage across the membrane of the target of receptor-mediated endocytosis is ineffective, it will not be removed from the tissue fluids or blood. Instead, it will stay in those fluids and increase in concentration. Some human diseases are caused by a failure of receptor-mediated endocytosis. For example, the form of cholesterol termed low-density lipoprotein or LDL (also referred to as "bad" cholesterol) is removed from the blood by receptormediated endocytosis. In the human genetic disease familial hypercholesterolemia, the LDL receptors are defective or missing entirely. People with this condition have life-threatening levels of cholesterol in their blood, because their cells cannot clear the chemical from their blood. Q: What is the process by which large particles, such as cells, are taken in by a cell? Choices: - active transport - diffusion - mitosis - phagocytosis A:
(Answer)
phagocytosis