GRE阅读前面有行序号吗？

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发现LSAT的长篇阅读每五行前面就有一个行序号，分别是（5），（10），（15）...，现在正式的GRE机考阅读还有行序号吗？如下：
Charles Darwin objected to all attempts to reduce
his theory of evolution to its doctrine of natural
selection. "Natural selection has been the main but not
the exclusive means of modification," he declared.
（5）Nonetheless, a group of self-proclaimed strict
constructionist Darwinians has recently risen to
prominence by reducing Darwin's theory in just this
way. These theorists use the mechanism of natural
selection to explain all biological phenomena; they
（10）assert that natural selection is responsible for every
aspect of every species' form and behavior, and for
the success or failure of species in general.
    Natural selection is generally held to result in
adaptation, the shaping of an organism's form and
（15）behavior in response to environmental conditions to
achieve enhanced reproductive success. If the strict
constructionists are right, the persistence of every
attribute and the survival of every species are due to
such adaptation. But in fact, nature provides numerous...