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true in Biological Definition

Carnivore

... an example of members of Carnivora that are not true carnivores. Carnivores that eat primarily (or ... are called insectivores . Animals that are true carnivores A true carnivore is an animal that subsists primarily ...

Albinism

... often kept as pets, e.g. albino gerbils . There have been no reports of true albinism in horses. White horses lack the pink eyes that make a true albino. Bristol Zoo was the home to a very rare albino African ...

Cladistics

... as possible. The hope is that a sufficiently large number of true syanpomorphies should be large enough to overwhelm any unintended ... to construct objective phylogenies. These can more accurately filter out true synapomorphy from parallel evolution. Cladistics does not assume any ...

Herbivore

... not to eat meat, such individuals are vegetarians , not herbivores. A true herbivore, such as a cow , is unable to chew or digest meat. However, ... that are unable to chew or digest animal matter. Animals that are true herbivores Bovids Horses (including all members of the horse ...

Thermoregulation

... build up brown fat reserves and be capable of slowing all body functions; true hibernators (e.g. groundhogs) keep their body temperature down throughout ... with them sometimes emerging from their dens for brief periods; bats are true hibernators which rely upon a rapid, nonshivering thermogenesis of their ...

Abiogenesis

... to speak, of failed paradigms. This must be done even if this leaves the decks entirely clear and no paradigms survive. It is a characteristic of the true believer in religion, philosophy and ideology that he must have a set of beliefs, come what may (Hoffer, 1951). Belief in a primeval soup on the ...

Alga

... independent lines of evolutionary development, although they all appear to have acquired photosynthesis from cyanobacteria . All algae lack true leaves , roots , flowers , and other tissue structures found in higher plants. They are distinguished from bacteria and protozoa in that they ...

Artificial life

... in explaining the simple rules that underlay complex effects in nature. Toffoli later provided a key proof that CAs were reversible , just as the true universe is considered to be. Christopher Langton was an unconventional researcher, with an undistinguished academic career that led him to a job ...

Biodiversity

... assesses biodiversity simply by distinguishing among species. At least 1.75 million species have been described; however, the estimates of the true number of current species range from 3.6 to more than 100 million. Some also say that the knowledge of the species and the families became ...

Cellular respiration

... , and at the cell membrane in prokaryotic cells . Anaerobic respiration (Fermentation) " Anaerobic respiration" It does not require oxygen. true anaerobic respiration involves an electron acceptor other than oxygen. Bacteria are capable of using a wide variety of compounds as terminal ...

Cellulose

... Given a cellulose material, the portion that does not dissolve in a 17.5% solution of sodium hydroxide at 20 deg C. is Alpha Cellulose , which is true cellulose; the portion that dissolves and then precipitates upon acidification is Beta Cellulose , and the proportion that dissolves but does not ...

Edward Jenner

... would thereafter be immune to the disfigurement of smallpox.) Cowpox is related to smallpox and Jenner realised that if the folk tradition were true it offered considerable advantages over the use of smallpox in inoculation. On May 14 , 1796 , he tested cowpox, infecting an eight year old boy ...

Eukaryote

... The eukaryotes share a common origin, and are often treated formally as a superkingdom, empire, or domain . The name comes from the Greek eus or true and karyon or nut, referring to the nucleus. Contents showTocToggle("show","hide") 1 Structure 2 Internal membranes 3 ...

Fungus

... show a hyphal organization and were once considered fungi. However they, and the closely related hypochytrids , are not actually related to the true fungi and instead belong among a group called the heterokonts , together with the golden algae , diatoms , brown algae and allies. The chytrids ...

Gene

... may remain the same or be only slightly altered, they are typically regarded as separate genes (i.e. not as alleles of the same gene). The same is true when duplicate sequences appear in different species. Yet, though the alleles of a gene differ in sequence, nevertheless they are regarded as a ...

Human

... The perception of an individual as physically beautiful or ugly can have profound implications for their lives. This is particularly true of women, whose external appearance is highly valued in most, if not all, human societies. The individual need for regular intake of food and ...

Immunology

... organism's immune system is absolutely capable of protecting it from most forms of harm. Insects and other arthropods , while not possessing true adaptive immunity, show highly evolved systems of innate immunity, and are additionally protected from external injury (and exposure to pathogens) by ...

Jean-Baptiste Lamarck

... of generations with no noticeable withering of the foreskin among their descendants. However, Lamarck did not count injury or mutilation as a true acquired characteristic, only those which were initiated by the animal's own needs were deemed to be passed on. Nowadays, the idea of passing on to ...

Liver

... folds back on itself to form the falciform ligament and the right and left triangular ligaments. These "ligaments" are in no way related to the true anatomic ligaments in joints, and have essentially no functional importance, but they are easily recognizable surface landmarks. Traditional gross ...

Macromolecule

... too small to see, individual pieces of DNA in solution can be broken in two simply by suctioning the solution through an ordinary straw. This is not true of smaller molecules. The 1964 edition of Linus Pauling 's College Chemistry asserted that DNA in nature is never longer than about 5000 base ...

Mendelian inheritance

... traits to mathematical probability. A large portion of Mendel's spectacular findings can be traced to his choice to start his experiments only with true breeding plants. He also only measured absolute characteristics such as color, shape, and position of the offspring. His data was expressed ...

Molecular evolution

... population is large, then a large number of alleles can be maintained. However, this result only holds for the neutral case, and is not necessarily true for the case when some alleles are more or less fit than others, for example when the fittest genotype is a heterozygote (a situation often ...

Modern evolutionary synthesis

... and speciation . A particular interpretation of neo-Darwinism most commonly associated with Richard Dawkins asserts that the gene is the only true unit of selection . Dawkins further extended the Darwinian idea to include non-biological systems exhibiting the same type of selective behavior of ...

Nutrition

... in the food pyramid ? Does an increase in the plant content of our diet reduce the risk of developing some chronic illnesses? Conversely, is it true that increases in animal products in food increases the incidence of some diseases? What more can we discover through what has been called the ...

Parthenogenesis

... plants. Among vertebrates, there are several genera of fish, amphibians, and reptiles that exhibit differing form of asexual reproduction, including true parthenogenesis, gynogenesis, and hybridogenesis, an incomplete form of parthenogenesis. Among the reptiles, about fifteen species of whiptail ...

Alga

... independent lines of evolutionary development, although they all appear to have acquired photosynthesis from cyanobacteria . All algae lack true leaves , roots , flowers , and other tissue structures found in higher plants. They are distinguished from bacteria and protozoa in that they ...

Plant

... The chloroplasts of green plants are surrounded by two membranes, suggesting they originated directly from endosymbiotic cyanobacteria . The same is true of the red algae , and the two groups are generally believed to have a common origin. In contrast, most other algae have chloroplasts with three or ...

Plant

... The chloroplasts of green plants are surrounded by two membranes, suggesting they originated directly from endosymbiotic cyanobacteria . The same is true of the red algae , and the two groups are generally believed to have a common origin. In contrast, most other algae have chloroplasts with three or ...

Population genetics

... in reality functions of the state variables in the other domain. The "sleight of hand" is assuming that we know this mapping, and it is certainly true that it is sufficient to proceed as if we do understand it, to analyze many cases of interest. For example, if the phenotype is almost one-to-one ...

Replication

... and fault-tolerance . Dynamic replication of data can also be used to improve performance. (See US Patent # 4432057). This is especially true in a multiplicity of computer systems (multiprocessors). Storage or backup of the same data on multiple file systems is an example for replication. ...

Rudolf Steiner

... he would have changed the name of his teachings every day, to keep people from hanging on to the literal meaning of those teachings, and to stay true to their character as something intended to be alive and metamorphic. Nor was Steiner shy about saying that his works would gradually become ...

Signal transduction

... processes of which the cell is capable influences how many ways it can react and respond to its environment. In a less direct way the same is true of animals and plants . Sensing in all forms of life depends, at the cellular level, on signal transduction. Contents ...

Synapse

... , does not undergo reuptake, but instead is removed from the synapse by the action of the enzyme acetylcholinesterase . By analogy to true synapses described above, the interface between an antigen presenting cell and lymphocyte is sometimes called an immunological synapse . ...
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