taxon

Vestigial organ

... Archaea Proposed, but not widely accepted, sixth taxon omic kingdom that would include the archaebacteria . Full article >>> Vertebrate limbs are a common example of such homologous structures. A vestigial organ or structure may exist with little or no purpose in one organ ism, thoug...

Vertebrates

...#62; A group of taxa that includes an ancestral taxon but not all descendants of that taxon - e.g. "fish" is a paraphyletic group because it does not include the other vertebrates , which ...

Taxon

...class ified? Full article >>> Such taxon omies as those analyzed by Durkheim and Lvi-Strauss are sometimes called folk taxon omies to distinguish them from scientific taxon omies that claim to be disembedded from social rela...

Reversal

...ew character , then lost it again, and the other taxon has never evolved it. Full article >>> Direct Reversal of Base Damage Base Excision Repair (BER) Nucleotide Excision Repair (NER) Xeroderma Pigmentosum (XP) Transcription -coupled NER Mismatch Repair (MMR) ... Full ...

Primary Structure

...amino acids in a protein . PICTURE primates The taxon omic order of mammals that includes prosimians (lemurs and tarsiers), monkeys, apes, and human s; character istics include large brain, stereoscopic vision, ... Full article >>> Primary Structure : Refers to the sequence of a...

Polyp

... >>> polyp hyletic Pertaining to a taxon whose members were derived from two or more ancestral forms not common to all members. polyp loid ... Full article >>> polyp loid y Abnormal variation in the number of chromosome sets. The condition when a cell or organ is...

Polarity

...matics, the order ing of alternative states of a taxon omic character from ancestral to successively derived conditions in an evolution ary transformation series. Full article >>> The polarity of an actin filament can be determined by decorating the microfilament with myosin "...

Phylum

...volution ary development of a species or higher taxon . Full article >>> phylum pl. phyla [Gk. phylon , race, tribe] A taxon omic category; phyla are divided into class es. Full article >>> phylum -- n. A ...

Phylogeny

...volution ary development of a species or higher taxon . Full article >>> phylogeny -- T...hylogeny The origin and diversification of any taxon , or the evolution ary history of its origin and diversification, usually presented in the form o...

Phylogenetics

...reek: phylon = race and genetic = birth) is the taxon omical class ification of organ isms based on how closely they are related in terms of evolution ary differences. See also ... Full article >>> phylogenetics -- Field of biology that deals with the relationships between organ i...

Phylogenetic tree

...Y Z ... Full article >>> clade A taxon or other group consisting of an ancestral species and all of its descendants, forming a distinct branch on a phylogenetic tree . Full article >>> affected by technological advances that have allowed researchers to determine related...

Phyla

...phylum pl. phyla [Gk. phylon , race, tribe] A taxon omic category; phyla are divided into class es....62;> [plural = phyla ]. Class : a higher taxon consisting of one or more order s and distinct from other taxa of similar rank Order : a higher ...

Paraphyletic

..... Full article >>> Paraphyletic taxon : A group composed of a collection of organ isms...etic A group of taxa that includes an ancestral taxon but not all descendants of that taxon - e.g. Full article >>> paraphyletic group...

Order

...ndwana. Full article >>> order A taxon omic grouping of related, similar families; the ca...tions. Full article >>> Order : A taxon omic sub division that contains groups of related families or superfamilies; usually ending in -pte...

Mycology

...genus , sometimes called the type genus of that taxon , with a standard ending. Full article >>>...

Monophyletic

...p. Full article >>> Monophyletic taxon : A group composed of a collection of organ isms...hat most recent common ancestor. A monophyletic taxon is also called a clade . Full article >>> Monophyletic A clade that comprises ...

Mitotic spindle

... chromatid to the mitotic spindle . kingdom A taxon omic category, the second broadest after domain . Full article >>> Eucaryote An organ ism with a nuclear membrane and membrane bound organelles (e.g. mitochondria ), and a mitotic spindle . This group of organ isms is more co...

Kingdom

...l article >>> kingdom s Five broad taxon omic categories ( Monera , Protista , Plantae , ...lia . Full article >>> kingdom A taxon omic category, the second broadest after domain . Koch's postulates ... Full article >>...

Integument

...tinction -- When all the members of a clade or taxon die, the group is said to be extinct. Full article >>> An organ system consists of two or more organ s which perform a specific task. Some organ systems are: the integument ary, nervous, sensory, endocrine, skeletal, muscular, c...

Insecta

...;>> Insects are invertebrates and are taxon omically referred to as the class Insecta . The...e most numerous and most widelyspread terrestrial taxon within the phylum Arthropoda. Full article >>> In Linnaeus' origin al scheme, the...

Genus

...#62; Genus . (plural: genera) The level of the taxon omic hierarchy above the species but below the ...article >>> Genus (pl. Genera) A taxon omic group containing one or more closely-related species Genome The complete collection of the...

Genotype

...arries Genus . (plural: genera) The level of the taxon omic hierarchy above the species but below the family level ... Full article >>> Genotype to Phenotype Individuals who inherit two N alleles have blood group N. Individuals who are homozygous for the M allele have blood ...

Family

...d ... Full article >>> Family : A taxon omic sub division of an order , containing a gro...#62; Genus . (plural: genera) The level of the taxon omic hierarchy above the species but below the family level ... Full article >>> ...

Extinction

...tinction -- When all the members of a clade or taxon die, the group is said to be extinct. Full article >>> Extinction is the disappearance of species , (i.e. gene pool s). The moment of extinction is generally considered to be the death of the last individual of that species . ...

Extant

...viving. Antonym: extinct. Genus (pl. Genera) A taxon omic group containing one or more closely-related species ... Full article >>> Most extant order s of insects developed during the Permian era that began around 270 million years ago. Full article >>> ). The oldest ...

Evolutionary biology

...ause it includes scientists from many traditional taxon omically-oriented disciplines. Full article >>> This is a list of topics in evolutionary biology and evolution . See also: List of biology topics, List of biochemistry topics, WikiProject Evolutionary biology Contents: ... Fu...

Evolution

...ause it includes scientists from many traditional taxon omically-oriented disciplines. Full article >>> Evolution ary dead ends are very common in the human fossil record. In fact, there are people who would claim that we probably don't know any direct ancestors to Homo sapiens in that...

Domain

... E ... Full article >>> domain A taxon omic category above the kingdom level; the three domain s are Archaea, Bacteria , and Eukarya. dominance hierarchy ... Full article >>> Domain : A discrete portion of a protein with its own function. The combination of domain s...

Division

...rder . Full article >>> Order : A taxon omic sub division that contains groups of related families or superfamilies; usually ending in -ptera in insects. Overwinter: A period of rest or hibernation by which insects survive the winter. Full article >>> Procaryotic cells re...

Crustacea

...volution ary development of a species or higher taxon . Full article >>> Arthropod: Any of the invertebrate animals (such as insects, spiders, or crustacea ns) having an exoskeleton , a segment ed body and jointed limbs. Full article >>>...

Conjugation

... . Full article >>> which of these taxon omic kingdom s? a) Plantae ; b) Protista ; c) Animalia ; d) Fungi ; e) Monera The sum of all energy trans fers within a cell is known as _____. a) photosynthesis ; b) cellular respiration ; c) metabolism ; d) replication ; e) conjugat...

Class

...lature. Full article >>> class A taxon omic grouping of related, similar order s; category above order and below phylum . class ical conditioning ... Full article >>> class I and class II genes. The next step in the evolution ary ladder is the bony fish . Full a...

Cladistics

... >>> cladistics (kluh-dis-tiks) A taxon omic approach that class ifies organ isms according to the order in time at which branches arise along a phylogenetic tree , without considering the degree of morphological divergence. Full article >>> Cladistics Ideally, a syst...

Clade

...cle >>> clade -- A monophyletic taxon ; a group of organ isms which includes the most r... A monophyletic group containing an ancestral taxon and all of its descendants. Chromosomes Structures in the cell nucleus , each containing the D...

Ciliophora

... this phylum , who named the genus (and higher taxon omic categories), etc. . Bowling Green State University Center for Algal Microscopy...Images and more, concentrating on diatoms. Full article >>>...

Cartilage

... ratfish (sub class Holocephali ). The earliest taxon which has both MHC ... Full article >>> ChondrodystrophicDwarfism a dominant semilethal form of dwarfism (chondro = cartilage ; dys = bad malicious hard; troph = food nourish nourishment) ... Full article >>> It ca...

Appendix

... Archaea Proposed, but not widely accepted, sixth taxon omic kingdom that would include the archaebacteria . Full article >>> appendix Refers to the appendix vermiformis of the colon . appetitive behavior The flexible introductory phase of a behavior sequence during which the org...

Anagenesis

... change producing a single lineage in which one taxon replaces another without branching. Related Terms: Evolution ... Full article >>> anagenesis (an-uh-jen-eh-sis) A pattern of evolution ary change involving the transformation of an entire population , sometimes to a state diff...

Alleles

...arries Genus . (plural: genera) The level of the taxon omic hierarchy above the species but below the family level ... Full article >>> The situation in which a heterozygote shows the phenotypic effects of both alleles fully & equally, (eg blood group antigens ). Full article ...