Answer the following question given this paragraph: There are many choices you can make to keep your nervous system healthy. One obvious choice is to avoid using alcohol or other drugs. Not only will you avoid the injury that drugs themselves can cause, but you will also be less likely to get involved in other risky behaviors that could harm your nervous system. Another way to keep the nervous system healthy is to eat a variety of healthy foods. The minerals sodium, calcium, and potassium, and vitamins B 1 and B 12 are important for a healthy nervous system. Some foods that are good sources for these minerals and vitamins include milk, whole grains, beef steak, and kidney beans (shown in Figure below ). Your brain also needs healthy fats like those in nuts and fish. Recall that fats insulate the axons of neurons. These fats help build new connections between nerves and brain cells. These fats may improve memory and increase learning and intelligence. Water is also important for the nervous system, so drink plenty of water and other fluids. This helps prevent dehydration, which can cause confusion and memory problems. And get plenty of rest. Your brain requires plenty of rest so it can strengthen circuits that help with memory. A good night's sleep will help keep your brain functioning at its best. Q: Why is water important for the nervous system? Choices: - to carry nutrients - to carry information - to prevent disease - to prevent dehydration A:
to prevent dehydration
(Question)
Answer the following question given this paragraph: Did you ever rub an inflated balloon against your hair? You can see what happens in Figure below . Friction between the rubber of the balloon and the baby's hair results in electrons from the hair "rubbing off" onto the balloon. That's because rubber attracts electrons more strongly than hair does. After the transfer of electrons, the balloon becomes negatively charged and the hair becomes positively charged. As a result, the individual hairs repel each other and the balloon and the hair attract each other. Electrons are transferred in this way whenever there is friction between materials that differ in their ability to give up or accept electrons. Q: When a balloon is rubbed against hair, they attract each other because of a difference in what? Choices: - Force - Friction - actions - charges A:
(Answer)
charges
Ques: Answer the following question given this paragraph: Microevolution is the process by which organisms change in small ways over time. Q: What is the process by which organisms change in small ways over time? Choices: - spontaneous mutation - natural selection - adaptation - microevolution A:
Ans: microevolution
(Q).
Answer the following question given this paragraph: The space shuttle program has been very successful. Over 100 mission have been flown. Space shuttle missions have made many scientific discoveries. Crews have launched many satellites. There have been other great achievements in space. However, the program has also had two tragic disasters. Q: Chemistry and physics are fields in what type of science? Choices: - Meteorology - Biology - Botany - physical A:
(A).
physical
Ques:Answer the following question given this paragraph: Because of the link between high levels of cholesterol and heart disease, it is commonly seen by the general public as a "bad" molecule. However, cholesterol plays a vital role in the body, as both a structural component of cell membranes and a metabolic precursor to various steroid hormones. Only about 30% of the cholesterol in our bodies comes from our diet; the rest is synthesized in the liver, intestines, adrenal glands, and reproductive organs. The same acetyl CoA molecule that provides biochemical energy can also be used by the body to synthesize cholesterol. There are approximately twenty-two steps involved in the formation of cholesterol from acetyl CoA. Q: What molecule can be used by the body to synthesize cholesterol ? Choices: - ethylene coa - hydroxide coa - chloride coa - acetyl coa A:

Ans:acetyl coa
Answer the following question given this paragraph: Q: What type of plants supplement their mineral nutrition by digesting animals? Choices: - perennials - annuals - herbivorous - carnivorous A:
carnivorous