Problem:OPTIONS:
- respiration of air
- excretion of food waste
- coordinate bones and muscles
- transporting substances around the body

Answer the following question given this paragraph: The main function of the cardiovascular system is transporting substances around the body. Figure above shows some of the substances that are transported in the blood. They include hormones, oxygen, nutrients from digested food, and cellular wastes. Transport of all these materials is necessary to maintain homeostasis of the body and life itself. Q: What is the main function of the cardiovascular system? A:
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A: transporting substances around the body

Problem:OPTIONS:
- Mesozoic
- Neoproterozoic
- Neoproterozoic era
- the carboniferous period

Answer the following question given this paragraph: The Carboniferous Period : Next, during the Carboniferous Period (360290 million years ago), widespread forests of huge plants left massive deposits of carbon that eventually turned to coal. The first amphibians evolved to move out of the water and colonize land, but they had to return to the water to reproduce. Soon after amphibians arose, the first reptiles evolved. They were the first animals that could reproduce on dry land. Q: During what period on earth was coal formed? A:
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A: the carboniferous period

Problem:OPTIONS:
- gravitational pull
- atmospheric pressure
- spontaneous combustion
- friction with atmosphere

Answer the following question given this paragraph: A meteoroid is dragged toward Earth by gravity and enters the atmosphere. Friction with the atmosphere heats the object quickly, so it starts to vaporize. As it flies through the atmosphere, it leaves a trail of glowing gases. The object is now a meteor. Most meteors vaporize in the atmosphere. They never reach Earth's surface. Large meteoroids may not burn up entirely in the atmosphere. A small core may remain and hit Earth's surface. This is called a meteorite . Q: What causes a meteoroid to vaporize after it enters the atmosphere? A:
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A: friction with atmosphere

Problem:OPTIONS:
- annelida
- Gordiacea
- amoebozoa
- nematoda

Answer the following question given this paragraph: Roundworms are invertebrates in Phylum Nematoda. Roundworms have a pseudocoelom and complete digestive system. They are free-living heterotrophs or parasites. Q: Roundworms are intervertebrates that belong to which phylum? A:
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A:
nematoda