Q: Puberty and other physical changes occurs during which stage of development? Choices: - childhood - infancy - adulthood - adolescence A:
adolescence

Q: Humans use many compounds that were first discovered or derived from living organisms as medicines: secondary plant compounds, animal toxins, and antibiotics produced by these? Choices: - bacteria and tumors - molecules and fungi - tumors and fungi - bacteria and fungi A:
bacteria and fungi

Q: Q: What is the term for an ionic compound that produces positive hydrogen ions when dissolved in water? Choices: - hydrocarbon - sulfur - base - acid A:
A: acid

Question: Q: Homes and transportation use what percent of all energy in the u.s.? Choices: - twenty five - fifteen - forty - half (fifty) A:
Answer: half (fifty)

*Question*
Q: What is a measure that has both size and direction? Choices: - length - velocity - wave - vector A:
**Answer**
vector

(Q).
Q: What do the hair cells in the cochlea release when they bend? Choices: - receptors - hormones - lipids - neurotransmitters A:
(A).
neurotransmitters