input: OPTIONS:
- fallopian tube
- prostate gland
- vas deferens
- the urethra Now, answer this question: Answer the following question given this paragraph: Q: What runs through the penis and opens to the outside at the tip of the penis? A:
A:
output: the urethra

input: OPTIONS:
- hydrocarbon
- microwaves
- radionuclide
- radioisotope Now, answer this question: Answer the following question given this paragraph: A radioisotope has atoms with unstable nuclei. Unstable nuclei naturally decay, or break down. They lose energy and particles and become more stable. As nuclei decay, they gain or lose protons, so the atoms become different elements. This is illustrated in the Figure below . The original, unstable nucleus is called the parent nucleus. After it loses a particle (in this case a type of particle called an alpha particle), it forms a daughter nucleus, with a different number of protons. Q: What has atoms with unstable nuclei? A:
A:
output: radioisotope

input: OPTIONS:
- their hairs
- their wings
- their scales
- their external skeleton Now, answer this question: Answer the following question given this paragraph: Each section contains a liquid crystal sample with a different liquid crystalline range. The section whose liquid crystalline range corresponds to the temperature of the body becomes translucent (here shown in green), indicating the temperature. We also see the effect of liquid crystals in nature. Iridescent green beetles, known as jewel beetles, change color because of the light-reflecting properties of the cells that make up their external skeletons, not because of light absorption from their pigment. The cells form helices with a structure like those found in cholesteric liquid crystals. When the pitch of the helix is close to the wavelength of visible light, the cells reflect light with wavelengths that lead to brilliant metallic colors. Because a color change occurs depending on a person's angle of view, researchers in New Zealand are studying the beetles to develop a thin material that can be used as a currency security measure. The automobile industry is also interested in exploring such materials for use in paints that would change color at different viewing angles. With only molecular structure as a guide, one cannot precisely predict which of the various liquid crystalline phases a given compound will actually form. One can, however, identify molecules containing the kinds of structural features that tend to result in liquid crystalline behavior, as demonstrated in Example 11. Q: Iridescent green beetles, known as jewel beetles, change color because of the light-reflecting properties of the cells that make up this? A:
A:
output:
their external skeleton