Answer the following question given this paragraph: Internal Energy U We can think about the internal energy of a system in two different but consistent ways. The first is the atomic and molecular view, which examines the system on the atomic and molecular scale. The internal energy U of a system is the sum of the kinetic and potential energies of its atoms and molecules. Recall that kinetic plus potential energy is called mechanical energy. Thus internal energy is the sum of atomic and molecular mechanical energy. Because it is impossible to keep track of all individual atoms and molecules, we must deal with averages and distributions. A second way to view the internal energy of a system is in terms of its macroscopic characteristics, which are very similar to atomic and molecular average values. Macroscopically, we define the change in internal energy. Q: What type of energy of a system is the sum of the kinetic and potential energies of its atoms and molecules? Choices: - external energy u - primary energy u - deep energy u - internal energy u A:
internal energy u
Answer the following question given this paragraph: Q: The contents of which organ are mixed every 20 seconds? Choices: - the metabolism - pancreas - kidney - the stomach A:
the stomach
Q: Answer the following question given this paragraph: The properties of cyclic hydrocarbons are generally quite similar to those of the corresponding open-chain compounds. So cycloalkanes (with the exception of cyclopropane, which has a highly strained ring) act very much like noncyclic alkanes. Cyclic structures containing five or six carbon atoms, such as cyclopentane and cyclohexane, are particularly stable. We will see in Chapter 16 "Carbohydrates" that some carbohydrates (sugars) form five- or six-membered rings in solution. Q: The properties of cyclic hydrocarbons are generally quite similar to those of the corresponding open-chain compounds. so cycloalkanes (with the exception of cyclopropane, which has a highly strained ring) act very much like noncyclic alkanes. cyclic structures containing five or six carbon atoms, such as cyclopentane and cyclohexane, are particularly what? Choices: - large - reactive - small - stable A:
A: stable
Question: Answer the following question given this paragraph: A grain of pollen is a tiny male gametophyte enclosed in a tough capsule (see Figure below ). It carries sperm to an ovule while preventing it from drying out. Pollen grains can't swim, but they are very light, so the wind can carry them. Therefore, they can travel through air instead of water. Q: What can be described as a tiny male gametophyte enclosed in a tough capsule? Choices: - seed - cell - dna - grain of pollen A:
Answer: grain of pollen
*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
Answer the following question given this paragraph: The cardiovascular system circulates blood through two different loops. Pulmonary circulation is a loop that carries blood between the heart and lungs. Systemic circulation is a loop that carries blood between the heart and the rest of the body. Q: What are the two loops of blood flow in the cardiovascular system? Choices: - anabolic and metabolic - aerobic and anaerobic - systolic and diastolic - pulmonary and systemic A:
pulmonary and systemic