Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quasireplicas and universal lengths of microbial genomes   Statistical analysis of distributions of occurrence frequencies of short
words in 108 microbial complete genomes reveals the existence of a set of
universal "root-sequence lengths" shared by all microbial genomes. These
lengths and their universality give powerful clues to the way microbial genomes
are grown. We show that the observed genomic properties are explained by a
model for genome growth in which primitive genomes grew mainly by maximally
stochastic duplications of short segments from an initial length of about 200
nucleotides (nt) to a length of about one million nt typical of microbial
genomes. The relevance of the result of this study to the nature of
simultaneous random growth and information acquisition by genomes, to the
so-called RNA world in which life evolved before the rise of proteins and
enzymes and to several other topics are discussed.

7
The categories of this paper are: hep-th
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The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex
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The categories of this paper are: math-ph
16
The categories of this paper are: stat
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin