Q: What do glands in the skin produce to cool down the body? Choices: - lactic acid - saliva - mucus - sweat A:
sweat

Q: What is the basis of enzyme classification? Choices: - their shape - their color - their mass - reactions they catalyze A:
reactions they catalyze

Q: 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: 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*
Q: What do aquatic arthropods use to exchange gases with the water? Choices: - nostrils - pores - lungs - gills A:
**Answer**
gills

Q: 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