Answer the following question given this paragraph: Lipids Lipids include a diverse group of compounds that are united by a common feature. Lipids are hydrophobic ("waterfearing"), or insoluble in water, because they are nonpolar molecules. This is because they are hydrocarbons that include only nonpolar carbon-carbon or carbon-hydrogen bonds. Lipids perform many different functions in a cell. Cells store energy for long-term use in the form of lipids called fats. Lipids also provide insulation from the environment for plants and animals (Figure 2.17). For example, they help keep aquatic birds and mammals dry because of their water-repelling nature. Lipids are also the building blocks of many hormones and are an important constituent of the plasma membrane. Lipids include fats, oils, waxes, phospholipids, and steroids. Q: In what form of lipids cells store energy for long-term use? Choices: - meat - nuts - treasure - fat A:
fat
Answer the following question given this paragraph: Q: Under which conditions do many bacteria carry out alcohol fermentation? Choices: - melting - enzymatic - photosynthesis - anaerobic A:
anaerobic
Q: Answer the following question given this paragraph: Figure 32.21 Supernovas are the source of elements heavier than iron. Energy released powers nucleosynthesis. Spectroscopic analysis of the ring of material ejected by Supernova 1987A observable in the southern hemisphere, shows evidence of heavy elements. The study of this supernova also provided indications that neutrinos might have mass. (credit: NASA, ESA, and P. Challis). Q: What celestial events are the source of elements heavier than iron? Choices: - neutrons - galaxies - Space - supernovas A:
A: supernovas
Question: Answer the following question given this paragraph: An underground layer of rock that is saturated with groundwater is called an aquifer . A diagram of an aquifer is pictured below ( Figure below ). Aquifers are generally found in porous rock, such as sandstone. Water infiltrates the aquifer from the surface. The water that enters the aquifer is called recharge . Q: What is the name for an underground layer of rock that is saturated with groundwater? Choices: - gradient - aqueous cavity - artesian well - aquifer A:
Answer: aquifer
*Question*
Answer the following question given this paragraph: 43.5 | Human Pregnancy and Birth By the end of this section, you will be able to: Explain fetal development during the three trimesters of gestation Describe labor and delivery Compare the efficacy and duration of various types of contraception Discuss causes of infertility and the therapeutic options available Pregnancy begins with the fertilization of an egg and continues through to the birth of the individual. The length of time of gestation varies among animals, but is very similar among the great apes: human gestation is 266 days, while chimpanzee gestation is 237 days, a gorilla's is 257 days, and orangutan gestation is 260 days long. The fox has a 57-day gestation. Dogs and cats have similar gestations averaging 60 days. The longest gestation for a land mammal is an African elephant at 640 days. The longest gestations among marine mammals are the beluga and sperm whales at 460 days. Q: What land mammal has the longest gestation period? Choices: - Rhino - Giraffe - Asian elephant - african elephant A:
**Answer**
african elephant
Q: Answer the following question given this paragraph: dissociated ions. It is a dynamic equilibrium because acid and base molecules are constantly dissociating into ions and reassociating into neutral molecules. The pH scale is a scale used to express the concentration of hydrogen ions in solution. A neutral solution, neither acidic nor basic, has a pH of 7. Acidic solutions have a pH lower than 7, while basic solutions have a pH higher than 7. Buffers are solutions that resist dramatic changes in pH when an acid or a base is added to them. They contain a weak acid and a salt of that weak acid, or a weak base and a salt of that weak base. When a buffer is present, any strong acid reacts with the anion of the salt, forming a weak acid and minimizing the presence of hydrogen ions in solution. Any strong base reacts with the weak acid, minimizing the amount of additional hydroxide ions in solution. However, buffers only have limited capacity; there is a limit to the amount of strong acid or strong base any given amount of buffer will react with. Q: The ph scale is a scale used to express the concentration of hydrogen ions in solution. a neutral solution, neither acidic nor basic, has a ph of what? Choices: - 6 - 0 - 8 - 7 A:
A: 7