Answer the following question given this paragraph: Arteries are muscular blood vessels that carry blood away from the heart. They have thick walls that can withstand the pressure of blood being pumped by the heart. Arteries generally carry oxygen-rich blood. The largest artery is the aorta , which receives blood directly from the heart. Q: What is the largest artery in the body called? Choices: - carotid - subclavian - femoral - aorta A:
aorta
Answer the following question given this paragraph: Roots are important organs in all vascular plants. Most vascular plants have two types of roots: primary roots that grow downward and secondary roots that branch out to the side. Together, all the roots of a plant make up a root system . Q: In vascular plants, do primary roots grow downward or to the side? Choices: - to the side - neither - it depends - downward A:
downward
Q: Answer the following question given this paragraph: Most archaea are chemotrophs and derive their energy and nutrients from breaking down molecules in their environment. A few species of archaea are photosynthetic and capture the energy of sunlight. Unlike bacteria, which can be parasites and are known to cause a variety of diseases, there are no known archaea that act as parasites. Some archaea do live within other organisms. But these archea form mutualistic relationships with their host, where both the archaea and the host benefit. In other words, they assist the host in some way, for example by helping to digest food. Q: Are the majority of archaea chemotrophs or photosynthetic? Choices: - photosynthetics - neither - autotrophs - chemotrophs A:
A: chemotrophs
Question: Answer the following question given this paragraph: Why must hadrons be white? The color scheme is intentionally devised to explain why baryons have three quarks and mesons have a quark and an antiquark. Quark color is thought to be similar to charge, but with more values. An ion, by analogy, exerts much stronger forces than a neutral molecule. When the color of a combination of quarks is white, it is like a neutral atom. The forces a white particle exerts are like the polarization forces in molecules, but in hadrons these leftovers are the strong nuclear force. When a combination of quarks has color other than white, it exerts extremely large forceseven larger than the strong forceand perhaps cannot be stable or permanently separated. This is part of the theory of quark confinement, which explains how quarks can exist and yet never be isolated or directly observed. Finally, an extra quantum number with three values (like those we assign to color) is necessary for quarks to obey the Pauli exclusion principle. Particles such as the , which is ++ composed of three strange quarks, sss , and the , which is three up quarks, uuu, can exist because the quarks have different colors and do not have the same quantum numbers. Color is consistent with all observations and is now widely accepted. Quark theory including color is called quantum chromodynamics (QCD), also named by Gell-Mann. Q: Quantum chromodynamics combines what property with quark theory? Choices: - mass - contrast - sound - color A:
Answer: color
*Question*
Answer the following question given this paragraph: Q: Lymph vessels, like veins, have what objects that prevent the backflow of fluid? Choices: - pumps - pores - fibers - valves A:
**Answer**
valves
Answer the following question given this paragraph: Ocean currents carry warm or cold water throughout the world's oceans. They help to even out the temperatures in the oceans. This also affects the temperature of the atmosphere and the climate around the world. Currents that are near shore have a direct impact on climate. They may make the climate much colder or warmer. You can see examples of this in Figure below . Q: What carries warm or cold water throughout the world's oceans? Choices: - gravity - pipes - earth rotation - ocean currents A:
ocean currents