Free GED GED-Science Exam Dumps Questions & Answers

Scientists are unraveling the mystery of how early life-forms were first able to duplicate themselves. Today, it is known that reproduction and growth requires both DNA and proteins. DNA holds the crucial genetic instructions for assembling amino acids into proteins. Proteins are key molecules that make up the structure of future generations. Precisely, how does this process occur? RNA seems to hold the key to an answer.
Which statement provides the best summation about the duplication of life-forms presented above?

• A.  Investigating questions of origin is an artist's function, not that of a scientist.
• B.  DNA is a small, very simple molecule.
• C.  Questions of origin are best resolved legislatively, by a vote among scientists.
• D.  Research studies should concentrate on copying protein molecules to form other protein
  molecules.
• E.  RNA may be involved in linking protein synthesis with DNA.

One wavelength is the distance from one crest of a wave to the next crest or from a trough (low point of a wave) to the next trough. The frequency of a wave is the number of crests that pass any given point each second.
Which of the following waves demonstrates the LOWEST frequency?

A)

B)

C)

D)

E)

• A.  Option B
• B.  Option A
• C.  Option C
• D.  Option D

Dr. Mullin collected data on the number of leaves that fell from a tree. She noticed that the number of leaves that fell varied substantially during the seasons of the year. The graph at the left describes Dr. Mullin's findings.

Based on the information and graph, which action would best help explain the data?

• A.  analyze the seasonal weather patterns of the area
• B.  measure the tree's diameter
• C.  measure the tree's height
• D.  measure the tree's circumference
• E.  measure the length of the tree's upper and lower branches

A community is a population of all living things, or organisms, in a given area. Communities consist of organisms that may interact with one another. When two organisms, each from a different species, interact, their interaction can be categorized as one of the following:
- Neutral interactions-do not directly affect either organism
- Commensalism-one organism benefits significantly; the other organism is not
affected to any great degree
- Mutualism-both organisms benefit greatly
- Predation-one organism (predator) gets its food from the other organism (prey);
the predator does not live on or inside its prey
- Parasitism-one organism (parasite) gets its food from the other organism (host);
the parasite lives on or inside the host and may kill it
Which category describes an interaction where a tapeworm feeds on intestinal material in the human body?

• A.  commensalism
• B.  parasitism
• C.  predation
• D.  neutral
• E.  mutualism

For years, DDT was used for mosquito control in the marshlands near Long Island, New York. Authorities claimed DDT was safe because the poison would be diluted by the seawater. However, tests later revealed that tissues of fish-eating birds in the area contained DDT levels 500,000 times higher than that of the surrounding seawater.
Which statement best explains why the authorities were incorrect in their assessment of the environmental impact of the use of DDT?

• A.  The nesting materials used by fish-eating birds became saturated with DDT.
• B.  DDT was introduced into the bloodstream of fish-eating birds by bites from dying mosquitoes.
• C.  The concentration of DDT increased in each organism as DDT moved through the links of the marshlands food chains.
• D.  DDT killed more birds than mosquitoes.
• E.  The fish-eating birds had been exposed to DDT in other areas besides the Long Island marshlands.