Problem:OPTIONS:
- electromagnetism
- hydroelectric power
- balanced reaction
- electric current

Answer the following question given this paragraph: 3. Electrical energy is the energy of moving electrons. Electrons flow through wires to create electric current. Q: Electrons flow through wires to create what? A:
****
A: electric current

Answer the following question given this paragraph: Particles of a hypothetical ideal gas have no significant volume and do not attract or repel each other. In general, real gases approximate this behavior at relatively low pressures and high temperatures. However, at high pressures, the molecules of a gas are crowded closer together, and the amount of empty space between the molecules is reduced. At these higher pressures, the volume of the gas molecules themselves becomes appreciable relative to the total volume occupied by the gas (Figure 9.36). The gas therefore becomes less compressible at these high pressures, and although its volume continues to decrease with increasing pressure, this decrease is not proportional as predicted by Boyle's law. Q: At high pressures, how are the molecules of a gas crowded? A:
OPTIONS:
- few together
- further apart
- small together
- closer together
closer together

Answer the following question given this paragraph: Because the health of cells depends on maintaining the proper levels of cations in intracellular fluids, any change that affects the normal flux of metal ions across cell membranes could well cause an organism to die. Molecules that facilitate the transport of metal ions across membranes are generally called ionophores (ionplus phore from the Greek phorein, meaning "to carry"). Many ionophores are potent antibiotics that can kill or inhibit the growth of bacteria. An example isvalinomycin, a cyclic molecule with a central cavity lined with oxygen atoms (part (a) in Figure 21.14 "Valinomycin Is an Antibiotic That Functions Like an Ionophore") that is similar to the cavity of a crown ether (part (a) in Figure 13.7 "Crown Ethers and Cryptands"). Like a crown ether, valinomycin is highly selective: its affinity for K+ is about 1000 times greater than that for Na+. By increasing the flux of K+ ions into cells, valinomycin disrupts the normal K+ gradient across a cell membrane, thereby killing the cell (part (b) in Figure 21.14 "Valinomycin Is an Antibiotic That Functions Like an Ionophore"). Figure 21.14 Valinomycin Is an Antibiotic That Functions Like an Ionophore. Q: Why is it necessary to maintain proper levels of cations in intercellular fluids? A:
OPTIONS:
- cell division
- reverse homeostasis
- for digestion
- keep cells healthy

Answer: keep cells healthy

Question: Answer the following question given this paragraph: Most fossils form when a dead organism is buried in sediment. Layers of sediment slowly build up. The sediment is buried and turns into sedimentary rock. The remains inside the rock also turn to rock. The remains are replaced by minerals. The remains literally turn to stone. Fossilization is illustrated in Figure below . Q: Most fossils form when a dead organism is buried in what? A:
OPTIONS:
- soil
- ash
- sand
- sediment
Answer: sediment

input with options: Answer the following question given this paragraph: Chloride ions are important in neutralizing positive ion charges in the body. If chloride is lost, the body uses bicarbonate ions in place of the lost chloride ions. Thus, lost chloride results in an increased reabsorption of bicarbonate by the renal system. Q: Why does the body react to a loss of chloride ions? A:
OPTIONS:
- increased tricarbonate reabsorption
- decreased bicarbonate reabsorption
- decreased tricarbonate reabsorption
- increased bicarbonate reabsorption
output: increased bicarbonate reabsorption

Problem: OPTIONS:
- primary succession
- typical succession
- tertiary succession
- secondary succession
Q: Answer the following question given this paragraph: Sometimes ecological succession occurs in areas where life has already existed. These areas already have soil full of nutrients. Secondary succession is the type of succession that happens after something destroys the habitat, such as a flood or other natural disaster. Abandoning a field that was once used for agriculture can also lead to secondary succession ( Figure below ). In this case, the pioneer species would be the grasses that first appear. Lichen would not be necessary as there is already nutrient-rich soil. Slowly, the field would return to its natural state. Q: What is the type of succession that happens after the destruction of a habitat? A:
Answer:
secondary succession