Ques:Answer the following question given this paragraph:   A lipid is an organic compound such as fat or oil. Organisms use lipids to store energy, but lipids have other important roles as well. Lipids consist of repeating units called fatty acids. Fatty acids are organic compounds that have the general formula CH 3 (CH 2 ) n COOH, where n usually ranges from 2 to 28 and is always an even number. There are two types of fatty acids: saturated fatty acids and unsaturated fatty acids.   Q: What do organisms use to store energy?   Choices:  - tissues  - proteins  - metabolytes  - lipids  A:

Ans:lipids
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Ques:Answer the following question given this paragraph:   Veins are blood vessels that carry blood toward the heart. This blood is no longer under pressure, so veins have thinner walls. To keep the blood moving, many veins have valves that prevent the backflow of blood. Veins generally carry oxygen-poor blood. The smallest veins are called venules. They merge to form larger and larger veins. The largest vein is the inferior vena cava, which carries blood from the lower body directly to the heart.   Q: What are the blood vessels that carry blood toward the heart and tend to have thinner walls?   Choices:  - capillaries  - glands  - clots  - veins  A:

Ans:veins
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Ques:Answer the following question given this paragraph:   Describing the flow of energy within an ecosystem essentially answers this question. To survive, one must eat. Why? To get energy. Food chains and webs describe the transfer of energy within an ecosystem, from one organism to another. In other words, they show who eats whom.   Q: Food chains and what describe the transfer of energy within an ecosystem, from one organism to another?   Choices:  - spider webs  - fuel webs  - the webs  - food webs  A:

Ans:food webs
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Ques:Answer the following question given this paragraph:   The mildest and most common type of brain injury is a concussion . This is a bruise on the surface of the brain. It may cause temporary problems such as headache, drowsiness, and confusion. Most concussions in young people occur when they are playing sports, especially contact sports like football. Other sports, like soccer, boxing, baseball, lacrosse, skateboarding, and hockey can also result in concussions. A concussion normally heals on its own in a few days.   Q: What is the mildest type of brain injury?   Choices:  - blunt trauma  - hydrocephalus  - dementia  - concussion  A:

Ans: