input: OPTIONS:
- circulatory system
- lymphatic system
- digestive system
- nervous system Now, answer this question: Answer the following question given this paragraph: Some people recover from spinal cord injuries. But many people are paralyzed for life. Thanks to the work of Christopher Reeve ( Figure below ), more research is being done on spinal cord injuries now than ever before. For example, scientists are trying to discover ways to regrow damaged spinal cord neurons. Q: What system is the spinal cord related to? A:
A:
output: nervous system

Answer the following question given this paragraph: An ideal gas is one that follows the gas laws at all conditions of temperature and pressure. To do so, the gas would need to completely abide by the kinetic-molecular theory. The gas particles would need to occupy zero volume and they would need to exhibit no attractive forces what so ever toward each other. Since neither of those conditions can be true, there is no such thing as an ideal gas. A real gas is a gas that does not behave according to the assumptions of the kinetic-molecular theory. Fortunately, at the conditions of temperature and pressure that are normally encountered in a laboratory, real gases tend to behave very much like ideal gases. Q: What is the term for a gas that completely abides by the kinetic-molecular theory? A:

OPTIONS:
- heat gas
- cold gas
- fast gas
- ideal gas

Answer: ideal gas

Problem: OPTIONS:
- beta bond
- lattice bond
- rna bond
- sigma bond
Q: Answer the following question given this paragraph: It is necessary to distinguish between the two types of covalent bonds in a C 2 H 4 molecule. A sigma bond ( bond) is a bond formed by the overlap of orbitals in an end-to-end fashion, with the electron density concentrated between the nuclei of the bonding atoms. A pi bond ( bond) is a bond formed by the overlap of orbitals in a side-by-side fashion, with the electron density concentrated above and below the plane of the nuclei of the bonding atoms. Figure below shows the two types of bonding in C 2 H 4 . The sp 2 hybrid orbitals are orange and the p z orbital is green. Three sigma bonds are formed by each carbon atom with its hybrid orbitals. The pi bond is the "second" bond of the double bond between the carbon atoms and is shown as an elongated blue lobe that extends both above and below the plane of the molecule, which contains the six atoms and all of the sigma bonds. Q: What term is used to describe a bond formed by the overlap of orbitals in an end-to-end fashion, with the electron density concentrated between the nuclei of the bonding atoms? A:
Answer: sigma bond

Problem:OPTIONS:
- hard shell
- brain
- skeleton
- backbone

Answer the following question given this paragraph: Vertebrates. From the smallest of fish to us. One of the main features we all have in common is our backbone. The Vertebrates chapter describes the biological features of fish, amphibians, reptiles, birds, and mammals. Q: One of the main features all vetebrates have in common is what? A:
****
A: backbone

Answer the following question given this paragraph: Much of the iron produced is refined and converted into steel. Steel is made from iron by removing impurities and adding substances such as manganese, chromium, nickel, tungsten, molybdenum, and vanadium to produce alloys with properties that make the material suitable for specific uses. Most steels also contain small but definite percentages of carbon (0.04%2.5%). However, a large part of the carbon contained in iron must be removed in the manufacture of steel; otherwise, the excess carbon would make the iron brittle. Q: Much of the iron produced is refined and converted into what? A:
OPTIONS:
- plastic
- wood
- sugar
- steel
steel

Answer the following question given this paragraph: Q: Portal veins carry blood between what? A:
OPTIONS:
- chambers of the heart
- digestive organs
- arteries
- pairs of capillary beds

Answer:
pairs of capillary beds