Answer the following question given this paragraph: glands in the skin that produce sweat, a salty fluid that helps cool down the body. Q: What do glands in the skin produce to cool down the body? Choices: - lactic acid - saliva - mucus - sweat A:
sweat
Answer the following question given this paragraph: Enzymes are classified by the types of reactions that they catalyze. Q: What is the basis of enzyme classification? Choices: - their shape - their color - their mass - reactions they catalyze A:
reactions they catalyze
Q: Answer the following question given this paragraph: Bird organ systems are adapted for flight. For example, they have light-weight air-filled bones and a large four-chambered heart. Q: Light-weight air-filled bones and a large four-chambered heart helps a bird do what? Choices: - swim - digest - run - fly A:
A: fly
Question: Answer the following question given this paragraph: Coral reefs ( Figure below ) look like big rocks, but they are actually alive. They are built from cnidarians called corals. The corals are sessile (non-moving) polyps that can use their tentacles to feed on ocean creatures that pass by. Their skeletons are made up of calcium carbonate, which is also known as limestone. Over long periods of time, their skeletons build on each other to produce large structures known as coral reefs. Coral reefs are important habitats for many different types of ocean life. Q: Although they look like big rocks, what structures that serve as habitats for many different types of ocean life are actually alive? Choices: - new forming reefs - natural reefs - southern reefs - coral reefs A:
Answer: coral reefs
*Question*
Answer the following question given this paragraph: Like mollusks and annelids, aquatic arthropods may have gills to exchange gases with the water (discussed below). Terrestrial arthropods, on the other hand, have special respiratory structures to exchange gases with the air. These are described in Figure below . Q: What do aquatic arthropods use to exchange gases with the water? Choices: - nostrils - pores - lungs - gills A:
**Answer**
gills
Q: Answer the following question given this paragraph: Note The first controlled chain reaction was achieved on December 2, 1942, in an experiment supervised by Enrico Fermi in a laboratory underneath the football stadium at the University of Chicago. Although fairly simple in theory, an atomic bomb is difficult to produce, in part because uranium-235, the isotope that undergoes fission, makes up only 0.7% of natural uranium; the rest is mostly uranium-238, which does not undergo fission. (Remember that the radioactive process that a nucleus undergoes is characteristic of the isotope. ) To make uranium useful for nuclear reactors, the uranium in uranium-235 must be enriched to about 3%. Enrichment of uranium is a laborious and costly series of physical and chemical separations. To be useful in an atomic bomb, the uranium in uranium-235 must be enriched to 70% or more. At lesser concentrations, the chain reaction cannot sustain itself, so no explosion is produced. Fusion is another nuclear process that can be used to produce energy. In this process, smaller nuclei are combined to make larger nuclei, with an accompanying release of energy. One example is the hydrogen fusion, which makes helium. While the steps of the process are complicated, the net reaction is: 41H 4He + 2.58 1012 J Saylor URL: http://www. saylor. org/books. Q: Fusion is another nuclear process that can be used to produce energy. in this process, smaller nuclei are combined to make larger nuclei, with an accompanying release of this? Choices: - food - mineral - cells - energy A:
A: energy