Answer the following question given this paragraph: Fish also have a centralized nervous system with a brain. Fish brains are small compared with the brains of other vertebrates, but they are large and complex compared with the brains of invertebrates. Fish also have highly developed sense organs that allow them to see, hear, feel, smell, and taste. Sharks and some other fish can even sense the very low levels of electricity emitted by other animals. This helps them locate prey. Q: Why do sharks sense low levels of electricity? Choices: - to locate mates - to sleep - to reproduce - to locate prey A:
to locate prey
Answer the following question given this paragraph: The brain serves as the control center of the nervous system and the body as a whole. It lets us understand what we see, hear, or sense in other ways. It allows us to learn, think, remember, and use language. It controls all the organs and muscles in our body. Q: What serves as the control center of the nervous system? Choices: - spine - bone - heart - brain A:
brain
Q: Answer the following question given this paragraph: Q: Which energy is momentarily stored in tendons after each leap provides a boost for the next leap? Choices: - alternating - thermal - magnetic - kinetic A:
A: kinetic
Question: Answer the following question given this paragraph: During adulthood, testosterone is needed for the production of sperm. Q: During adulthood, what is needed for the production of sperm? Choices: - steroids - estrogen - androgen - testosterone A:
Answer: testosterone
*Question*
Answer the following question given this paragraph: There are two different types of specific immune responses. One type involves B cells. The other type involves T cells. Recall that B cells and T cells are types of white blood cells that are key in the immune response. Whereas the immune system's first and second line of defense are more generalized or non-specific, the immune response is specific. It can be described as a specific response to a specific pathogen, meaning it uses methods to target just one pathogen at a time. These methods involve B and T cells. Q: B cells and t cells are examples of what type of cells? Choices: - heart cells - cancer cells - skin cells - white blood cells A:
**Answer**
white blood cells
*Question*
Answer the following question given this paragraph: redox reaction will occur. The only question is whether lead will be oxidized to Pb(II) or Pb(IV). Because BrF3 is a powerful oxidant and fluorine is able to stabilize high oxidation states of other elements, it is likely that PbF4 will be the product. The two possible reduction products for BrF3 are BrF and Br2. The actual product will likely depend on the ratio of the reactants used. With excess BrF3, we expect the more oxidized product (BrF). With lower ratios of oxidant to lead, we would probably obtain Br2 as the product. Exercise Predict the products of each reaction and write a balanced chemical equation for each reaction. Q: What are the two possible reduction products for brf3? Choices: - brg and brf - brf2 and brf4 - brf and brf4 - brf and br2 A:
**Answer**
brf and br2