*Question*
Answer the following question given this paragraph: Q: Small crustaceans exchange gases across thin areas of the cuticle; larger species have what to accomplish this? Choices: - noses - pores - lungs - gills A:
**Answer**
gills

*Question*
Answer the following question given this paragraph: Molecules need to collide in order for a reaction to take place. Q: What do molecules need to do for a reaction to take place? Choices: - explode - melt - separate - collide A:
**Answer**
collide

*Question*
Answer the following question given this paragraph: Figure 15.1 Fight or Flight? Though the threats that modern humans face are not large predators, the autonomic nervous system is adapted to this type of stimulus. The modern world presents stimuli that trigger the same response. (credit: Vernon Swanepoel). Q: The fight or flight response involves what system? Choices: - functional nervous system - cellular nervous system - voluntary nervous system - autonomic nervous system A:
**Answer**
autonomic nervous system

*Question*
Answer the following question given this paragraph: You've probably been using a ruler to measure length since you were in elementary school. But you may have made most of the measurements in English units of length, such as inches and feet. In science, length is most often measured in SI units, such as millimeters and centimeters. Many rulers have both types of units, one on each edge. The ruler pictured below has only SI units. It is shown here bigger than it really is so it's easier to see the small lines, which measure millimeters. The large lines and numbers stand for centimeters. Count the number of small lines from the left end of the ruler (0.0). You should count 10 lines because there are 10 millimeters in a centimeter. Q: What is the standard measurement for mass? Choices: - volume - calories - BMI - grams A:
**Answer**
grams