Answer the following question given this paragraph: Each step in the process is either a gain of oxygen or a loss of hydrogen. Each step also releases energy, which explains why the complete combustion of alkanes to carbon dioxide is an extremely exothermic reaction. Q: The complete combustion of alkanes to carbon dioxide is an extremely __________ reaction. Choices: - hydrolic - geothermal - reactive - exothermic A:
exothermic
Answer the following question given this paragraph: Neural Control of Thermoregulation The nervous system is important to thermoregulation, as illustrated in Figure 33.22. The processes of homeostasis and temperature control are centered in the hypothalamus of the advanced animal brain. Q: The processes of homeostasis and temperature control are centered in the hypothalamus of the advanced animal brain, thus thermoregulation depends on what organ system? Choices: - circulatory system - digestive system - cardiovascular system - nervous system A:
nervous system
Q: Answer the following question given this paragraph: Giant elliptical galaxies contain over a trillion stars. Elliptical galaxies are red to yellow in color because they contain mostly old stars. Most contain very little gas and dust because the material has already formed into stars. Q: Which type of galaxies contain very little gas and dust, are red to yellow in color, contain over a trillion stars and have mostly old stars? Choices: - blue elliptical galaxies - giant orbital galaxies - giant gaseous galaxies - giant elliptical galaxies A:
A: giant elliptical galaxies
Question: Answer the following question given this paragraph: Metallic bonds are the force of attraction between positive metal ions and the valence electrons that are constantly moving around them. The ions form a lattice-like structure held together by the metallic bonds. Q: What types of bonds hold together positive metal ions and their valence electrons? Choices: - ionic bonds - covalent bonds - toxic bonds - metallic bonds A:
Answer: metallic bonds
*Question*
Answer the following question given this paragraph: Fish are covered with scales. Scales are overlapping tissues, like shingles on a roof. They reduce friction with the water. They also provide a flexible covering that lets fish move their body to swim. Q: What covers the body of a fish to help the move their body to swim? Choices: - gelatin - skin - hairs - scales A:
**Answer**
scales
(Question)
Answer the following question given this paragraph: Metamorphism. This long word means "to change form. " A rock undergoes metamorphism if it is exposed to extreme heat and pressure within the crust. With metamorphism, the rock does not melt all the way. The rock changes due to heat and pressure. A metamorphic rock may have a new mineral composition and/or texture. Q: What is a rock exposed to if it's undergoing metamorphism? Choices: - humidity and pressure - gravity and precipitation - time and energy - heat and pressure A:
(Answer)
heat and pressure