the complete disappearance of an animal or plant species .............. back
The complete loss of an entire species.
If the orientation of the crystals that appear white or colored between crossed polars is changed by rotating the stage, all single crystals will be observed to disappear (become black) four times during complete rotation of the stagee. The positions are 90o apart; they reveal the vibration directions of each crystal. These directions will parallel the vibration directions of the two polars when the crystal is extinct.
To cease to exsist. To disappear from life. (See : PLATE TECTONICS)
1.) The disappearance of an entire species, wherein every individual in the given species dies. 2.) The process of becoming extinct; dying out or coming to an end (Morris 1992).
Disappearance of a species from all or part of their geographic range. Also see background extinction and mass extinction.
The evolutionary termination of a species caused by the failure to reproduce and the death of all remaining members of the species; the natural failure to adapt to environmental change.
The weakening of a reinforced operant response as a result of ceasing reinforcement. See also operant conditioning. Also, the elimination of a conditioned response by repeated presentations of a conditioned stimulus without the unconditioned stimulus. See also respondent conditioning.
The natural or human-induced process by which a species, subspecies or population ceases to exist.
The total dying out of a species of animal, plant, etc.—whether due to natural and/or human-made causes.
the processes that cause all members of a species to die
The dying out of a species, or the condition of having no remaining living members; also the process of bringing about such a condition.
The death of the last members of a species so that there are no parents to pass on their genetic traits to offspring.
The process of ceasing to exist.
The death of an entire species.
The loss of a stock of fish from its original range, or as a distinct stock elsewhere. Individuals of the same species may be observed in very low numbers, consistent with straying from other stocks.
(Also see the introduction to Past Extinctions) The state in which all members of a groups of organisms, such as a species, population, family or class, have disappeared from a given habitat, geographic area, or the entire world.
(in Learning) Association between stimulus and behavior lessens after discontinuing the pairing of conditioned and unconditioned stimulus(in Evolution) All individuals of a particular species have died; Related Terms: Acquisition
The total disappearance of a species of plant or animal. Most widely known is the extinction of the dinosaurs.
no longer active; extinguished; "the extinction of the volcano"
the act of extinguishing; causing to stop burning; "the extinction of the lights"
the man-induced or natural process whereby a species, breed or type ceases to exist.
ex-TINK-shun Disappearance of a type of organism. 815
The wiping out of an entire species of plant or animal.
The dying out of a species of living thing, and its complete disappearance from the earth.
a species no longer capable of reproducing; a species that no longer exists
dying out of a species. amine: desperate shortage of food in an area; starvation, hunger.
The state of a species no longer existing throughout its entire range
Complete, global loss of a species.
The disappearance of a species or a population.
The irrevocable elimination of species; can be a normal process of the natural world as species out-compete or kill off others or as environmental conditions change.
the complete loss of all individuals of a species
The total disappearance of a species or higher taxon, so that it no longer exists anywhere.
The disappearance of a type (species) of plant or animal from Earth. Some species become extinct because of non-human forces - like the dinosaurs! - but many others are becoming endangered or threatened with extinction because of human activities.
a species or subspecies is extinct when no living members exist
the act of becoming extinct, a species is extinct when no living members exist
the complete disappearance of a species from Earth's gene pool.
Dissapearance of a single species, a group of species, or higher taxa consisting of few or many species. There were five great mass extinctions and 10 or more lesser mass extinctions during the late 550 million years of life history (Phanerozoic eon, see below). Marine fossil record has documented five mass extictions in Cambrian Period, three in the Mezozoic Era, and two in the Cenozoic Era. The mass extinction at the end of the Cretaceous Period is famous by elimination of the dinosaurs and many other organisms. Another extinction that occured during the final ten million years of the Permian Perion has eliminated as many as 96% of the species of marine animals. Precambrian fossil record demonstrates great extinction of the phytoplancton (see below) at about 850 million years ago, elimination of the stromatolite (see below) bacterial communities at about the same time, and extinction of some groups of invertebrates at the very end of the Precambrian.
complete disappearance of an entire species
The complete disappearance of a type of organism.
When there are no more organisms left of a particular species and with no possible way to bring them back
the death of all individuals of a particular species
Complete disappearance of a species from the earth. This happens when a species cannot adapt and successfully reproduce under new environmental conditions or when it evolves into one or more new species. See also endangered species, mass depletion, mass extinction, threatened species. Compare speciation.
The permanent loss of a species when the last member dies.
The failure of a taxonomic group to produce direct descendants, causing its worldwide disappearance from the record at a given point in time.
Process where no more of a species live on our planet, e.g. dinosaurs are extinct. Many species are threatened with extinction.
elimination of a taxon (e.g., species)
The resulting term given to mark the end of a species or group of creatures. Extinction usually results from a long-term change in the environment, which subsequently triggers a period of decline and eventual end. The dinosaurs are perhaps the best example of a group of reptiles which faced mass extinction at the end of the Cretaceous period.
Extinction is the process in which groups of organisms (species) die out.
The condition that arises from the death of the last surviving individual of a species, group, or gene, globally or locally.
n: Complete disappearance of a species from the earth. This happens when a species cannot adapt and successfully reproduce under new environmental conditions, when it evolves (through a process called radiation ) into one or more new species, or when every member of the species is killed by overpredation, pollution, or other man-made causes.
In biology and ecology, extinction is the cessation of existence of a species or group of taxa, reducing biodiversity. The moment of extinction is generally considered to be the death of the last individual of that species (although the capacity to breed and recover may have been lost before this point). Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively.