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:
OPTIONS:
- uterus
- embryo
- appendix
- placenta
placenta

Answer the following question given this paragraph: Cancer of the testes is most common in males aged 15 to 35. It occurs when cells in the testes grow out of control and form a tumor. If found early, cancer of the testes usually can be cured with surgery. Q: What forms when cells start to grow out of control? A:
OPTIONS:
- fat
- moles
- inflammation
- tumor

Answer: tumor

Question: Answer the following question given this paragraph: Natural gas burns cleaner than other fossil fuels. As a result, it causes less air pollution. It also produces less carbon dioxide than the other fossil fuels. Because it burns cleaner than other fossil fuels, natural gas has a good reputation. Still, natural gas does emit pollutants. Q: Natural gas burns cleaner and produces less carbon dioxide than fuels of what type? A:
OPTIONS:
- renewable fuels
- solar energy
- biofuels
- fossil fuels
Answer: fossil fuels

input with options: Answer the following question given this paragraph: Each kidney is supplied by a renal artery and renal vein. Q: Each kidney is supplied by a renal artery and what else? A:
OPTIONS:
- spinal cord
- brain vein
- coronary artery
- renal vein
output: renal vein

Q: Answer the following question given this paragraph: distinctly differ from the adult form, spending 3 to 15 years as suspension feeders. Once they attain sexual maturity, the adults reproduce and die within days. Lampreys possess a notochord as adults; however, this notochord is surrounded by a cartilaginous structure called an arcualia, which may resemble an evolutionarily early form of the vertebral column. Q: What do we call the cartilaginous structure that surrounds the notochrod? A:

OPTIONS:
- osteocytes
- clavicle
- membrane
- arcualia

A: arcualia

Answer the following question given this paragraph: The strength of a base depends on how many hydroxide ions it produces when it dissolves in water. A stronger base produces more hydroxide ions than a weaker base. For example, sodium hydroxide (NaOH), a base in drain cleaner, is a strong base because all of it breaks down into ions when it dissolves in water. Calcium carbonate (CaCO 3 ), a base in antacids, is a weak base because only a small percentage of it breaks down into ions in water. Q: What determines the strength of a base when dissolved in water? A:
OPTIONS:
- amount of phosphorus ions produced
- pH level
- saline content
- amount of hydroxide ions produced
amount of hydroxide ions produced