PrepTest 43, Section 2, Question 2
Essayist: Earth is a living organism, composed of other organisms much as animals are composed of cells, not merely a thing upon which creatures live. This hypothesis is supported by the fact that, like all organisms, Earth can be said to have a metabolism and to regulate its temperature, humidity, and other characteristics, divorced from the influences of its surroundings. Of course, Earth does not literally breathe, but neither do insects (they have no lungs), though they respire successfully.
Essayist: Earth is a living organism, composed of other organisms much as animals are composed of cells, not merely a thing upon which creatures live. This hypothesis is supported by the fact that, like all organisms, Earth can be said to have a metabolism and to regulate its temperature, humidity, and other characteristics, divorced from the influences of its surroundings. Of course, Earth does not literally breathe, but neither do insects (they have no lungs), though they respire successfully.
Essayist: Earth is a living organism, composed of other organisms much as animals are composed of cells, not merely a thing upon which creatures live. This hypothesis is supported by the fact that, like all organisms, Earth can be said to have a metabolism and to regulate its temperature, humidity, and other characteristics, divorced from the influences of its surroundings. Of course, Earth does not literally breathe, but neither do insects (they have no lungs), though they respire successfully.
Essayist: Earth is a living organism, composed of other organisms much as animals are composed of cells, not merely a thing upon which creatures live. This hypothesis is supported by the fact that, like all organisms, Earth can be said to have a metabolism and to regulate its temperature, humidity, and other characteristics, divorced from the influences of its surroundings. Of course, Earth does not literally breathe, but neither do insects (they have no lungs), though they respire successfully.
The assertion that insects do not literally breathe plays which one of the following roles in the essayist's argument?
a reason for not rejecting Earth's status as an organism on the basis of its not breathing
a reason for rejecting as false the belief that Earth is a living organism
an illustration of the general claim that to be an organism, a creature must have a metabolism
an example of a type of organism whose status, like Earth's, is unclear
an illustration of a type of organism out of which Earth is composed
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