Answer the following question given this paragraph: Homeostasis refers to the balance, or equilibrium, within the cell or a body. It is an organism's ability to keep a constant internal environment. Keeping a stable internal environment requires constant adjustments as conditions change inside and outside the cell. The adjusting of systems within a cell is called homeostatic regulation. Because the internal and external environments of a cell are constantly changing, adjustments must be made continuously to stay at or near the set point (the normal level or range). Homeostasis is a dynamic equilibrium rather than an unchanging state. The cellular processes discussed in both the Diffusion and Active Transport concepts all play an important role in homeostatic regulation. You will learn more about homeostasis in other concepts. Q: What term refers to the balance, or equilibrium, within the cell or a body, and an organism's ability to keep a constant internal environment? Choices: - metabolism - ketosis - consciousness - homeostasis A:
homeostasis
Answer the following question given this paragraph: New technologies can be developed. Renewable energy sources emit fewer or no greenhouse gases. These sources are discussed in the chapter Natural Resources . Q: What type energy sources emit fewer or no greenhouse gases? Choices: - gas - animal - fossil - renewable A:
renewable
Q: Answer the following question given this paragraph: Electromagnetic radiation is a form of energy. Q: Electromagnetic radiation is a form of what? Choices: - fusion - wave - fuel - energy A:
A: energy
Question: Answer the following question given this paragraph: Q: The final stage of labor is delivery of the what? Choices: - uterus - umbilical cord - embryo - placenta A:
Answer: placenta
*Question*
Answer the following question given this paragraph: Mammals have separate sexes and reproduce sexually. They produce eggs or sperm and must mate in order for fertilization to occur. A few mammals are oviparous. They lay eggs, which later hatch. These mammals are called monotremes. Most mammals are viviparous and give birth to live young. These mammals are either placental mammals or marsupials. Placental mammals give birth to relatively large and well-developed fetuses. Marsupials give birth to smaller, less-developed embryos. In both placental and marsupial mammals, the young grow and develop inside the mother's body in an organ called the uterus. At birth, they pass through a tube-like organ called the birth canal, or vagina. Q: Mammals that lay eggs are called what? Choices: - viviparous - herbivores - marsupial - monotremes A:
**Answer**
monotremes
Q: Answer the following question given this paragraph: Phase and Surface Area Effects When two reactants are in the same fluid phase, their particles collide more frequently than when one or both reactants are solids (or when they are in different fluids that do not mix). If the reactants are uniformly dispersed in a single homogeneous solution, then the number of collisions per unit time depends on concentration and temperature, as we have just seen. If the reaction is heterogeneous, however, the reactants are in two different phases, and collisions between the reactants can occur only at interfaces between phases. The number of collisions between reactants per unit time is substantially reduced relative to the homogeneous case, and, hence, so is the reaction rate. The reaction rate of a heterogeneous reaction depends on the surface area of the more condensed phase. Automobile engines use surface area effects to increase reaction rates. Gasoline is injected into each cylinder, where it combusts on ignition by a spark from the spark plug. The gasoline is injected in the form of microscopic droplets because in that form it has a much larger surface area and can burn much more rapidly than if it were fed into the cylinder as a stream. Similarly, a pile of finely divided flour burns slowly (or not at all), but spraying finely divided flour into a flame produces a vigorous reaction (Figure 14.3 "The Effect of Surface Area on Reaction Rates"). Similar phenomena are partially responsible for dust explosions that occasionally destroy grain elevators or coal mines. Q: Do particles collide more in two reactants when they are both in fluid forms or solid forms? Choices: - plasma - neither - solid - fluid A:
A: fluid