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GED Science Exam

Question No: 61

Using new, advanced methods of biotechnology, scientists can produce copies of genes of one species and insert them into the chromosomes of another species. The resulting transgenic plants offer potential advantages that are unobtainable through conventional methods.

A gene that is active against corn borers is inserted into corn plants.

When the plants reach maturity, which of the following outcomes might be expected?

  1. The plants will resist corn borers.

  2. The bacteria will infect the plants.

  3. The corn plants will be taller.

  4. The plants will wither and die.

  5. The corn will have a better flavor.

Answer: A

Question No: 62

Scientists who study the inheritance of characteristics from one generation to the next have used organisms such as peas, fruit flies, mold, and mice. These organisms were chosen because they all share some common features, such as being small, producing many

offspring, and maturing rather quickly.

Which of the following organisms would be the BEST choice for a controlled study of inheritance from generation to generation?

  1. elephants

  2. corn

  3. deer

  4. elm trees

  5. whales

Answer: B

Question No: 63

Getting rid of solid waste is a major problem in many cities. Open spaces for landfills are becoming scarce. Burning solid waste may produce harmful gases as well as particles in the surrounding air. Recycling is useful, but effective techniques for recycling some materials have yet to be developed. Marine disposal may damage the delicate ecosystems in this fragile environment.

Which of the following solid waste disposal techniques would MOST LIKELY result in air pollution?

  1. recycling

  2. landfills

  3. marine disposal

  4. landscaping

  5. burning

Answer: E

Question No: 64

Windchill is the rate of heat loss on the human body resulting from the combined effects of low temperature and wind. As wind speeds increase, heat is carried away from the body at a faster rate, thus lowering both the skin temperature and, ultimately, the internal body temperature. Many other factors can affect the impact of windchill, such as type of clothing worn, the amount of flesh exposed, and an individual#39;s physical condition.

Based on the information provided, which of these practices would BEST protect a person from the damaging effects of windchill on a severe day?

  1. Dressing as one would at any other time of the year.

  2. Staying close to other people when outdoors.

  3. Staying outdoors as much as possible to get used to the windchill.

  4. Going indoors occasionally to warm up.

  5. Covering all parts of the body with warm, waterproof, and insulated clothing.

Answer: E

Question No: 65

The nightshade family of plants includes more than 2000 species of herbs, shrubs, and small trees. Plants with edible parts include the potato, tomato, eggplant, and red pepper. Some nightshade members such as jimsonweed and belladonna contain poisonous substances. Tobacco and petunias are also in the nightshade family.

Which of the following most accurately describes the entire group of plants in the nightshade family?

  1. poisonous plants

  2. edible plants

  3. no economically important species

  4. no agriculturally important plants

  5. a large variety of species

Answer: E

Question No: 66

Detergents, which are often kept in low places where their brightly colored containers can attract young children, account for more poisonings in the home than any other product. Part of the problem is that consumers do not recognize the difference between synthetic detergents, which are poisonous, and ordinary soaps, which are not.

The passage above would most likely come from a book that has which of the following titles?

  1. A Guide to Household Pollutants

  2. Decorating Tips for Your Home

  3. Mechanics for the Home Hobbyist

  4. Chemistry: The Study of Matter

  5. Radon: How to Rid Your Home of the Danger

Answer: A

Question No: 67

After a hard rainfall, some of the falling water runs off into streams and is carried away. Some water moves down into Earth’s soil and is used by plants.

The remaining water goes back into Earth’s atmosphere as a result of which process?

  1. erosion

  2. evaporation

  3. condensation

  4. filtration

  5. precipitation

Answer: B

Question No: 68

Earth’s system is observed by noting changes and interactions of the oceans, land, the atmosphere, and organisms. Some of these changes and interactions happen daily, while others take place over long periods of time.

Which of the following changes and interactions happen on a daily basis?

  1. The ocean tides change.

  2. Mountain peaks are formed.

  3. The atmosphere gains more oxygen and loses nitrogen.

  4. Organisms develop new observable characteristics.

  5. Volcanoes erupt.

Answer: A

Question No: 69

Which of the following statements would explain why some objects feel more solid to the touch than others?

  1. The object’s molecules are moving rapidly.

  2. All solids can be classified only as metals.

  3. The object’s surface is flat.

  4. The space is very small between the molecules.

  5. The object is made up of heavy molecules.

Answer: D

Question No: 70

The microorganisms that cause food to spoil grow best at room temperature and in the presence of water.

Which of the following actions BEST helps prevent food spoilage?

  1. exposing the food to air

  2. keeping the food at room temperature

  3. adding water to the food

  4. freezing the food

  5. covering the food while warm

Answer: D

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