input: OPTIONS:
- uterus
- embryo
- appendix
- placenta Now, answer this question: Answer the following question given this paragraph: The placenta is a temporary organ that begins to form from the trophoblast layer of cells shortly after implantation. (For an animation showing how the placenta forms, go to link below. ) The placenta continues to develop and grow to meet the needs of the growing fetus. A fully developed placenta, like the one in Figure above , is made up of a large mass of blood vessels from both the mother and fetus. The maternal and fetal vessels are close together but separated by tiny spaces. This allows the mother's and fetus's blood to exchange substances across their capillary walls without the blood actually mixing. Q: What is the name of the temporary organ that begins to form from the trophoblast layer of cells shortly after implantation? A:
A:
output: placenta

Answer the following question given this paragraph: Many fungi get organic compounds from living organisms. They have close relationships with other species. A close relationship between two species is called a symbiotic relationship. Two symbiotic relationships in fungi are mycorrhiza and lichen. These relationships are beneficial for both species. Q: What do you call a close relationship between two species that benefits both? A:

OPTIONS:
- commensalism
- primordial relationship
- parasitic relationship
- symbiotic relationship

Answer: symbiotic relationship

Problem: OPTIONS:
- Newton
- Galileo
- janus
- copernicus
Q: Answer the following question given this paragraph: The Scientific Revolution occurred in Europe. This was the beginning of modern Western science. Many scientific advances were made during this time. Copernicus proposed that the sun, not Earth, is the center of the solar system. Q: During the scientific revolution, who proposed that the sun, not earth, is the center of the solar system? A:
Answer: copernicus

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: The temperature at which a substance melts is called its melting point. The melting point of ice is 0C. Q: What do we call the temperature at which a substance melts? A:
OPTIONS:
- boiling point
- precipitation point
- evaporation point
- melting point
melting point

Answer the following question given this paragraph: Mars has two moons that are thought to be captured asteroids. Q: What are mars' moons thought to be? A:
OPTIONS:
- guerrillas asteroids
- new asteriods
- common asteriods
- captured asteroids

Answer:
captured asteroids