Classifying diverse groups of closely related organisms that differ by very subtle differences is difficult using a cladistic approach.

Classifying the different subtypes of aphasia is difficult and has led to disagreements among experts.

Classifying all possible trajectories has led to the qualitative study of dynamical systems, that is, properties that do not change under coordinate changes.

Classifying ecosystems into ecologically homogeneous units is an important step towards effective ecosystem management, but there is no single, agreed-upon way to do this.

Classifying and identifying Kinder Surprise toys is a rather complex exercise.

Classifying children's literature is equally confusing.

Classifying data is a common task in machine learning.

Classifying musical instruments on the basis sociohistorical factors as well as mode of sound production is common in Indonesia.

Classifying speech into normal and disordered is more problematic than it first seems.

Classifying ballistic missiles by range is done mostly for convenience, in principle there is very little difference between a low-performance ICBM and a high-performance IRBM.

Classifying the many different forms of myoclonus is difficult because the causes, effects, and responses to therapy vary widely.

In " A Computer Program for Classifying Plants ", published in October 1960, a method of classification based on a similarity ratio, and a derived distance function, is given.

Classifying the work as a Docetic gospel, Harris defines the community in which it arose as well as its use during the Patristic age.

(" System and Method for Scan-Dialing Telephone Numbers and Classifying Equipment Connected to Telephone Lines Associated therewith.

David Nolan first published the current version of the chart in an article named " Classifying and Analyzing Politico-Economic Systems " in the January 1971 issue of The Individualist, the monthly magazine of the Society for Individual Liberty ( SIL ).

* Classifying space for foliations

Classifying toner to the desired size distribution produces off-size rejects, but these become valuable feedstocks for the compounding operation, and are recycled this way.

* Classifying space for O ( n ),

* Classifying space for U ( n ),

Classifying these directions under the common denominator ' absolute idealism ', though, would be incorrect, because it would blur distinctions which are necessary for comprehending these traditions in their own right.

* 1989 Daniel Gorenstein for his book Finite Simple Groups, An Introduction to their Classification ( Plenum Press, 1982 ); and his two survey articles The Classification of Finite Simple Groups and Classifying the Finite Simple Groups, Bulletin of the American Mathematical Society, volume 1 ( 1979 ) pp. 43-199, and volume 14 ( 1986 ) pp. 1-98, respectively.

# ‘ Classifying Biblical Criticism ’, Journal for the Study of the Old Testament 29 ( 1984 ), pp. 19-35.

* Classifying space for U ( n )

; Classifying Offenses: Rules for classifying the Part I offenses ( see Uniform Crime Reports for information on Part I offenses )

Classifying according to mathematical graph theory, USB buses are directed trees, whereas FireWire buses have a true bus network topology.

After the initial discovery of introns in protein-coding genes of the eukaryotic nucleus, there was significant debate as to whether introns in modern-day organisms were inherited from a common ancient ancestor ( termed the introns-early hypothesis ), or whether they appeared in genes rather recently in the evolutionary process ( termed the introns-late hypothesis ).

As knowledge has increased, paleontology has developed specialized sub-divisions, some of which focus on different types of fossil organisms while others study ecology and environmental history, such as ancient climates.

Body fossils and trace fossils are the principal types of evidence about ancient life, and geochemical evidence has helped to decipher the evolution of life before there were organisms large enough to leave fossils.

Techniques developed in engineering have been used to analyse how ancient organisms might have worked, for example how fast Tyrannosaurus could move and how powerful its bite was.

Fossil fuels such as coal and gasoline store ancient energy derived from sunlight by organisms that later died, became buried and over time were then converted into these fuels.

Taxonomy ( from ancient Greek taxis, arrangement, and nomia, method ) is the academic discipline of defining groups of biological organisms on the basis of shared characteristics and giving names to those groups.

The doctrine of spontaneous generation was coherently synthesized by Aristotle, who compiled and expanded the work of prior natural philosophers and the various ancient explanations of the appearance of organisms ; it held sway for two millennia.

miRNAs are well conserved in eukaryotic organisms and are thought to be a vital and evolutionarily ancient component of genetic regulation.

Archaea Domain – prokaryotic, no nuclear membrane, distinct biochemistry and RNA markers from eubacteria, possess unique ancient evolutionary history for which they are considered some of the oldest species of organisms on Earth ; traditionally classified as archaebacteria ; often characterized by living in extreme environments

The history of Nordland is a tale about the gifts from the sea: One of the most productive seas in the world providing food all year since ancient times, the same sea creates a climate more moderate than any other place in the arctic ; even the bedrock itself enriched by sea living organisms millions of years ago in the geological past.

S. T. Joshi and David E. Schultz cited other literary inspirations: Guy de Maupassant's " The Horla " ( 1887 ), which Lovecraft described in " Supernatural Horror in Literature " as concerning " an invisible being who ... sways the minds of others, and seems to be the vanguard of a horde of extraterrestrial organisms arrived on earth to subjugate and overwhelm mankind "; and Arthur Machen's " The Novel of the Black Seal " ( 1895 ), which uses the same method of piecing together of disassociated knowledge ( including a random newspaper clipping ) to reveal the survival of a horrific ancient being.

This is thought to have been the primary means of energy production in earlier organisms before oxygen was at high concentration in the atmosphere and thus would represent a more ancient form of energy production in cells.

The park is notable for its groves of ancient bristlecone pines, the oldest known non-clonal organisms ; and for the Lehman Caves at the base of Wheeler Peak.

Konservat-Lagerstätten preserve lightly sclerotized and soft-bodied organisms or traces of organisms that are not otherwise preserved in the usual shelly and bony fossil record ; thus, they offer more complete records of ancient biodiversity and behavior and enable some reconstruction of the palaeoecology of ancient aquatic communities.

Pre-Columbian rock art in the Indian Hill archeological area. Since the late 19th century, numerous scientific studies and published papers have centered on the marine organisms that inhabited the ancient Sea of Cortez.

All organisms studied contain many RNases of many different classes, showing that RNA degradation is a very ancient and important process.

Although he supported the then novel views that the Earth was ancient and organisms evolved through common descent, his mechanism was one of advancement, not natural selection ( which would come later ).

The First Ones are the ancient alien races of the galaxy, the first organisms to achieve sentience and the first to become spacefaring.

In the case of the puffer fish, and other marine organisms harboring TTX-producing Vibrionaceae, the symbiosis is an ancient and powerful one, providing protection against predation for the marine organisms that harbor these bacteria, while providing the bacteria a protected environment with plenty of nutrients for growth.