Answer the following question given this paragraph: The deeper water of a lake makes up the profundal zone. There isn't enough light for photosynthesis in this zone, so most organisms here eat dead organisms that drift down from the water above. Organisms in the profundal zone may include clams, snails, and some species of fish. Q: What do most organisms eat in the profundal zone of a lake? Choices: - fresh organisms - algae organism - fish waste - dead organisms A:
dead organisms
Answer the following question given this paragraph: 17.4 Doppler Effect and Sonic Booms The characteristic sound of a motorcycle buzzing by is an example of the Doppler effect. The high-pitch scream shifts dramatically to a lower-pitch roar as the motorcycle passes by a stationary observer. The closer the motorcycle brushes by, the more abrupt the shift. The faster the motorcycle moves, the greater the shift. We also hear this characteristic shift in frequency for passing race cars, airplanes, and trains. It is so familiar that it is used to imply motion and children often mimic it in play. The Doppler effect is an alteration in the observed frequency of a sound due to motion of either the source or the observer. Although less familiar, this effect is easily noticed for a stationary source and moving observer. For example, if you ride a train past a stationary warning bell, you will hear the bell's frequency shift from high to low as you pass by. The actual change in frequency due to relative motion of source and observer is called a Doppler shift. The Doppler effect and Doppler shift are named for the Austrian physicist and mathematician Christian Johann Doppler (18031853), who did experiments with both moving sources and moving observers. Doppler, for example, had musicians play on a moving open train car and also play standing next to the train tracks as a train passed by. Their music was observed both on and off the train, and changes in frequency were measured. What causes the Doppler shift? Figure 17.14, Figure 17.15, and Figure 17.16 compare sound waves emitted by stationary and moving sources in a stationary air mass. Each disturbance spreads out spherically from the point where the sound was emitted. If the source is stationary, then all of the spheres representing the air compressions in the sound wave centered on the same. Q: The characteristic sound of a motorcycle buzzing by is an example of which effect? Choices: - warp effect - coreolis effect - polar effect - doppler effect A:
doppler effect
Q: Answer the following question given this paragraph: The mesosphere has a very low density of gas molecules. Q: What is the concentration of gas molecules in the mesosphere? Choices: - high density - low density - medium density - very low density A:
A: very low density
Question: Answer the following question given this paragraph: Simon Cousins. Ice cubes in cola cause the cola to lose thermal energy . CC BY 2.0. Q: Ice cubes in cola cause the cola to lose what? Choices: - mechanical energy - kinetic energy - gravity - thermal energy A:
Answer: thermal energy
*Question*
Answer the following question given this paragraph: 13.2.1 The Detailed Dark Reactions What the Dark Reactions Do: The dark reactions build sugar from carbon dioxide gas (CO2), water (H2O), and energy from ATP molecules that were charged up during the light reactions. The dark reactions occur in the stroma of a chloroplast. Dark reactions usually occur in the light, but they don't have to. They'll occur in the dark until the chloroplast's supply of ATP runs out (usually about 30 seconds). The Calvin Cycle: The Calvin Cycle is the fancy name for the metabolic pathway that builds sugar. This means that it involves a whole lot of chemical reactions, and it uses a lot of different enzymes to catalyze the reactions. Carbon dioxide gas is stable, therefore the bonds that hold the carbon and oxygen atoms are strong. Therefore it takes a lot of energy to break the bonds and separate the carbon atoms from the oxygen atoms. The energy needed to do this comes from ATP molecules. When inorganic carbon (like from CO2) is being added to an organic molecule (such as sugar), this is called carbon fixation. It takes 2 complete turns of the Calvin Cycle to make a glucose molecule. Some portions of this text is based on notes very generously donated by Paul Doerder, Ph. , of the Cleveland State University. The detailed portions are not provided by Dr. Doerder. How cells divide. Q: The calvin cycle is the fancy name for the metabolic pathway that builds what? Choices: - proteins - fats - carbohydrates - sugar A:
**Answer**
sugar
Q: Answer the following question given this paragraph: Q: All living things are able to produce what? Choices: - proteins - tissue - toxins - offspring A:
A: offspring