Answer the following question given this paragraph: About 13.7 billion years ago, the entire universe was packed together. Everything was squeezed into a tiny volume. Then there was an enormous explosion. After this "big bang," the universe expanded rapidly ( Figure below ). All of the matter and energy in the universe has been expanding ever since. Scientists have evidence this is how the universe formed. One piece of evidence is that we see galaxies moving away from us. If they are moving apart, they must once have been together. Also, there is energy left over from this explosion throughout the universe. The theory for the origin of the universe is called the Big Bang Theory . Q: The once compressed universe expanded rapidly after what nicknamed event billions of years ago? Choices: - big explosion - good bang - big bust - big bang A:
big bang

Answer the following question given this paragraph: Most primates have opposable thumbs. An opposable thumb can be brought into opposition with the other fingers of the same hand. This allows the hand to grasp and hold things. Q: Most members of what mammalian order possess opposable thumbs? Choices: - marsupials - rodents - amphibians - primates A:
primates

Answer the following question given this paragraph: The cell membrane consists of two adjacent layers of phospholipids. The lipid tails of one layer face the lipid tails of the other layer, meeting at the interface of the two layers. The phospholipid heads face outward, one layer exposed to the interior of the cell and one layer exposed to the exterior (Figure 3.3). Because the phosphate groups are polar and hydrophilic, they are attracted to water in the intracellular fluid. Intracellular fluid (ICF) is the fluid interior of the cell. The phosphate groups are also attracted to the extracellular fluid. Extracellular fluid (ECF) is the fluid environment outside the enclosure of the cell membrane. Interstitial fluid (IF) is the term given to extracellular fluid not contained within blood vessels. Because the lipid tails are hydrophobic, they meet in the inner region of the membrane, excluding watery intracellular and extracellular fluid from this space. The cell membrane has many proteins, as well as other lipids (such as cholesterol), that are associated with the phospholipid bilayer. An important feature of the membrane is that it remains fluid; the lipids and proteins in the cell membrane are not rigidly locked in place. Q: The cell membrane consists of two adjacent layers of what? Choices: - lecithin - membranes - eukaryotes - phospholipids A:
phospholipids

Answer the following question given this paragraph: The rare earth metals are a set of seventeen chemical elements (the lanthanide series plus scandium and yttrium) that have particular importance for a variety of industrial processes and are used frequently in modern technology. Despite their name, rare earth metals are actually relatively abundant in the earth's crust. However, the extraction of many of these metals is quite difficult and has made their supply somewhat limited. They are highly sought after for this reason. Figure below shows the rare earth metals. Q: What do you call the set of seventeen chemical elements possessing particular importance for a variety of industrial processes, used frequently in modern technology? Choices: - base chemicals - fossil fuel - reactive elements - rare earth metals A:
rare earth metals