Problem: OPTIONS:
- carbon bond
- Ionic bond
- radiation bond
- chemical bond
Q: Answer the following question given this paragraph: A chemical bond is a force of attraction between atoms or ions. Bonds form when atoms share or transfer valence electrons. Q: What bond is a force of attraction between ions and atoms? A:
Answer: chemical bond

Problem:OPTIONS:
- stress fracture
- rheumatism
- osteoporosis
- osteoarthritis

Answer the following question given this paragraph: Osteoarthritis occurs when the cartilage at the ends of the bones breaks down. The break down of the cartilage leads to pain and stiffness in the joint. Decreased movement of the joint because of the pain may lead to weakening of the muscles that normally move the joint, and the ligaments surrounding the joint may become loose. Osteoarthritis is the most common form of arthritis . It has many contributing factors, including aging, sport injuries, fractures, and obesity. Q: What occurs when the cartilage at the ends of the bones breaks down? A:
****
A: osteoarthritis

Answer the following question given this paragraph: Most prokaryotes have one or more long, thin "whips" called flagella (flagellum, plural) . You can see flagella in Figure below . Flagella help prokaryotes move toward food or away from toxins. Each flagellum spins around a fixed base. This causes the cell to roll and tumble. Q: What thin whip-like structures help prokaryotes move toward food or away from toxins? A:
OPTIONS:
- sporangia
- cilia
- antennae
- flagella
flagella

Answer the following question given this paragraph: Energy is passed up a food chain or web from lower to higher trophic levels. However, generally only about 10 percent of the energy at one level is available to the next level. This is represented by the ecological pyramid in Figure below . What happens to the other 90 percent of energy? It is used for metabolic processes or given off to the environment as heat. This loss of energy explains why there are rarely more than four trophic levels in a food chain or web. Sometimes there may be a fifth trophic level, but usually there's not enough energy left to support any additional levels. Q: What are the "levels" in a food chain or web called? A:
OPTIONS:
- parts
- root
- gauges
- trophic

Answer: trophic

Question: Answer the following question given this paragraph: Q: What type of mammals includes opossums, kangaroos, and koalas? A:
OPTIONS:
- crustaceans
- arthropods
- monotremes
- marsupials
Answer: marsupials

input: OPTIONS:
- liver
- steel
- bark
- skin Now, answer this question: Answer the following question given this paragraph: This drawing shows that the skin has many layers. The outer layer is so tough that it keeps out most pathogens. Q: The outer layer of what anatomical structure is so tough that it keeps out most pathogens? A:
A:
output:
skin