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19 Aug 2005, 19:57
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Please explain your answer choice.....
Not all life depends on energy from sunlight. Microbial life has been found in bedrock more than 5 km below the surface of the earcth, and bacteria have been found on the deep ocean floor feeding on hydrogen and other gases rising from the interior of the earth through vents in the ocean floor.
The statement above, if true, best support which of the following as a concln?
a. The location in the bedrock where microbial life was found was not near a system of volcanic vents through which hydrogen and other gases rose from the interior of the earth.
b. Bacteria are able to exist at the molten center of the earth.
c. A thorough survey of the planet's surface is insufficient to eastablish beyond a doubt that the planet contains no life.
d. Life probably exists on sun-orbiting comets, which are cold agglomerations of space , dust and frozen gas.
e. Finding bacterial remains in coal and oil would establish that the bacteria had been feeding on substances that had not been produced from the energy of sunlight.
Not all life depends on energy from sunlight. Microbial life has been found in bedrock more than 5 km below the surface of the earcth, and bacteria have been found on the deep ocean floor feeding on hydrogen and other gases rising from the interior of the earth through vents in the ocean floor.
The statement above, if true, best support which of the following as a concln?
a. The location in the bedrock where microbial life was found was not near a system of volcanic vents through which hydrogen and other gases rose from the interior of the earth.
b. Bacteria are able to exist at the molten center of the earth.
c. A thorough survey of the planet's surface is insufficient to eastablish beyond a doubt that the planet contains no life.
d. Life probably exists on sun-orbiting comets, which are cold agglomerations of space , dust and frozen gas.
e. Finding bacterial remains in coal and oil would establish that the bacteria had been feeding on substances that had not been produced from the energy of sunlight.
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19 Aug 2005, 21:49
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e. Finding bacterial remains in coal and oil would establish that the bacteria had been feeding on substances that had not been produced from the energy of sunlight.
20 Aug 2005, 02:08
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I don't like how it is formulated, but I pick C
E says that the bacteria are already dead. We don't know how oil and coal are formed, so we know nothing about the living environment of the bacteria before they ended up in the dirt. Maybe it was nice and sunny...
C suggests that the surface of a planet is not the only place where life could exist. The passage supports that statement, because it tells us that there is life under the surface of our planet.
E says that the bacteria are already dead. We don't know how oil and coal are formed, so we know nothing about the living environment of the bacteria before they ended up in the dirt. Maybe it was nice and sunny...
C suggests that the surface of a planet is not the only place where life could exist. The passage supports that statement, because it tells us that there is life under the surface of our planet.
