Ques:Q: What attaches a muscle to a bone? Read this paragraph and choose the correct option from the provided answers: When skeletal muscles contract, bones move. But how do muscles make your bones move? A voluntary muscles usually works across a joint. It is attached to both the bones on either side of the joint by strong cords called tendons. A tendon is a tough band of connective tissue that connects a muscle to a bone. Tendons are similar to ligaments, except that ligaments join bones to each other. Muscles move the body by contracting against the skeleton. When muscles contract, they get shorter. By contracting, muscles pull on bones and allow the body to move. Choices: - marrow - arteries - veins - tendons A:

Ans:tendons
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Ques:Q: What are groups of tens to hundreds of thousands of stars held tightly together by gravity called? Read this paragraph and choose the correct option from the provided answers: Television broadcasts also use radio waves. Sounds are encoded with frequency modulation, and pictures are encoded with amplitude modulation. The encoded radio waves are broadcast from a TV tower like the one in Figure below . When the waves are received by television sets, they are decoded and changed back to sounds and pictures. Choices: - elliptical clusters - elongated clusters - galaxy - globular clusters A:

Ans:globular clusters
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Ques:Q: Smoking increases the risk of cancer from what radioactive gas that can also be detected with a test kit for your home? Read this paragraph and choose the correct option from the provided answers: Radon is also radioactive and can easily be inhaled into the lungs. Over time, this internal radon exposure can lead to the development of lung cancer. The incidence of lung cancer in smokers exposed to radon is much higher than that in non-smokers exposed to radon since smoking has already produced some lung damage, and the radon simply makes the damage worse. Radon exposure is highest in homes lacking good air circulation to move the gas out of the residence. There are a number of inexpensive approaches to decreasing your exposure to radon. A good start is to test your living area for radon with a radon test kit. Choices: - arsenic - carbon monoxide - carbon dioxide - radon A:

Ans:radon
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Ques:Q: The fact that all animals have certain traits in common shows that they share what? Read this paragraph and choose the correct option from the provided answers: There is great variation among species that make up the animal kingdom. Some of this variation is shown in Figure below . Despite the variation, there are a number of traits that are shared by all animals. The fact that all animals have certain traits in common shows that they share a common ancestor. How did such a diverse group of organisms evolve? What traits do all animals share? Read on to find out. Choices: - a common gene - a common brain - a common planet - a common ancestor A:

Ans:
a common ancestor
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