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GED-Science Latest Exam (Sep 2017)

[Free] 2017(Sep) EnsurePass Testking GED GED-Science Dumps with VCE and PDF 31-40

September 26, 2017

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2017 Sep GED Official New Released GED-Science
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GED Science Exam

Question No: 31

Many years ago, beavers were introduced to a region of California that they had not previously inhabited. Forty years later, the beaver population had grown so much that a cluster of aspen trees used by the beavers for food and building materials inside the national forest became endangered. The beavers were also interfering with the water systems.

In retrospect, how would biologists most likely evaluate the impact of the introduction of the beaver?

  1. an important tool for controlling the aspen population

  2. a disruption of the forest ecosystem

  3. a model program for other animals

  4. very successful from an ecological viewpoint

  5. having no significant effect on the forest ecosystem

Answer: B

Question No: 32

There is more vegetation present in areas with mild climates than in areas with harsh climates. Pollen analysis is one of the tools used to study past climates. The diagram at the left shows information about sediments of the same age, sampled from different parts of the world.

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Which of the sediments most likely represents the area with the mildest climate?

  1. A

  2. B

  3. C

  4. D

  5. E

Answer: D

Question No: 33

A food chain is a way of showing food relationships among a group of organisms that share an environment. The illustration at the left represents a freshwater food chain.

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What is most likely to happen if the supply of large fish in a pond is reduced by extensive fishing?

  1. Humans will eat more algae.

  2. The amount of algae will increase.

  3. The population of small fish will increase.

  4. Small fish will get smaller.

  5. Large fish begin to eat algae.

Answer: C

Question No: 34

During a clear night, many stars are visible from Earth. During the day, the only visible star is the Sun. Why are other stars not visible during the day?

  1. The stars are on the other side of Earth.

  2. Stars do not shine in the daytime.

  3. The daytime sky is brighter than starlight.

  4. The stars’ dark sides are facing us.

  5. The atmosphere reflects starlight during the day.

Answer: C

Question No: 35

Which is the best conclusion about the nutritional value of hot dogs based on the information in the chart?

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  1. All-beef hot dogs have more fat than chicken hot dogs.

  2. A turkey hot dog is the best choice for sensible eating.

  3. The more pork in a hot dog, the higher the number of calories.

  4. A “light” hot dog is a guarantee that it has low fat.

  5. Hot dogs made only from chicken have the lowest fat content per ounce (oz).

Answer: A

Question No: 36

– Exhibit –

Since carbon dioxide dissolves in water to form an acid, an acid-base indicator such as bromthymol blue is used to track the acid concentration during plant photosynthesis and respiration. Bromthymol blue turns yellow in an acid solution and remains blue in a basic solution. The color change is reversible. A student used the following procedure to track carbon dioxide.

In an experiment, a student placed a solution of bromthymol blue into each of two flasks, inserted a drinking straw in each flask, and blew through the straw until the solution turned fromblue to yellow. Carbon dioxide, a waste product in the student’s breath, caused the color change. The student then placed a small Elodea water plant in each flask and closed the flasks with rubber stoppers. Flask A was placed in bright sunlight, while flask B was placed in the dark for 24 hours, as shown in the figure below.

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After 24 hours, the bromthymol blue in flask A had turned back to blue, while in flask B it was still yellow.

– Exhibit-

The experiment was designed to track what substance?

  1. water

  2. bromthymol blue

  3. glucose

  4. carbon dioxide

  5. chlorophyll

Answer: D

Question No: 37

– Exhibit –

Since carbon dioxide dissolves in water to form an acid, an acid-base indicator such as bromthymol blue is used to track the acid concentration during plant photosynthesis and respiration. Bromthymol blue turns yellow in an acid solution and remains blue in a basic solution. The color change is reversible. A student used the following procedure to track carbon dioxide.

In an experiment, a student placed a solution of bromthymol blue into each of two flasks, inserted a drinking straw in each flask, and blew through the straw until the solution turned from blue to yellow. Carbon dioxide, a waste product in the student’s breath, caused the color change. The student then placed a small Elodea water plant in each flask and closed the flasks with rubber stoppers. Flask A was placed in bright sunlight, while flask B was placed in the dark for 24 hours, as shown in the figure below.

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After 24 hours, the bromthymol blue in flask A had turned back to blue, while in flask B it was still yellow.

– Exhibit –

If living things use oxygen and release carbon dioxide during respiration, what is the most probable reason that the atmosphere does not become depleted of oxygen and become filled with carbon dioxide?

  1. Plants replace the oxygen in the atmosphere and use carbon dioxide during photosynthesis.

  2. The atmosphere supplies large amounts of oxygen and absorbs large amounts of carbon dioxide.

  3. Carbon dioxide in the atmosphere breaks down in sunlight to release oxygen and water.

  4. Carbon dioxide is used by many invertebrate animals in place of oxygen during respiration.

  5. Plants don’t use oxygen from the atmosphere in the dark, but they do use carbon dioxide.

Answer: A

Question No: 38

– Exhibit –

Since carbon dioxide dissolves in water to form an acid, an acid-base indicator such as bromthymol blue is used to track the acid concentration during plant photosynthesis and respiration. Bromthymol blue turns yellow in an acid solution and remains blue in a basic solution. The color change is reversible. A student used the following procedure to track carbon dioxide.

In an experiment, a student placed a solution of bromthymol blue into each of two flasks, inserted a drinking straw in each flask, and blew through the straw until the solution turned from blue to yellow. Carbon dioxide, a waste product in the student’s breath, caused the color change. The student then placed a small Elodea water plant in each flask and closed the flasks with rubber stoppers. Flask A was placed in bright sunlight, while flask B was placed in the dark for 24 hours, as shown in the figure below.

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After 24 hours, the bromthymol blue in flask A had turned back to blue, while in flask B it was still yellow.

– Exhibit –

What relationship was the experiment designed to explore?

The relationship between light and:

  1. the color of bromthymol blue

  2. amount of liquid in the flask

  3. the rate of photosynthesis

  4. plant production of water

  5. plant consumption of carbon dioxide

Answer: E

Question No: 39

Touch sensors of nerves adapt to some degree after they have been stimulated for a period of time. On the first touch, a very high impulse rate of nerve signals is sent to the brain. But the rate then slows until some sensors stop responding altogether.

Which of the following is an example of the nerve touch sensors slowing down?

  1. A person is wearing eyeglasses, but doesn’t feel them.

  2. A person has a cut that heals quickly.

  3. A person gets a bruise that hurts at the touch.

  4. A person gets a painful blister from repetitive motion against an object.

  5. A person gets very sunburned and turns red.

Answer: A

Question No: 40

The basic unit of structure and function of a living thing is a cell. A group of specialized cells of the same type works together to form a tissue. Tissues work together to form an organ. Organs work together to form an organ system. Complete systems work together to form a multicellular organism.

According to this organizational description, what is an eye?

  1. a cell

  2. a tissue

  3. an organ

  4. an organ system

  5. an organism

Answer: C

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