Period in Biological Definition
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Period in Biological Definition
... theory for further information about this period
While Darwin was still on the voyage, ... of my theory" of how species originated.
A period of house-hunting culminated with finding "Macaw ... becoming a key fixture of popular culture of the period (and beyond). As attention and controversy ...
... the average amount of diabetic control over a period of about 3 months (the average red blood cell ... as hypoglycaemia and usually happens over a period of days rather than hours or minutes. If left ... see what levels they are achieving over a given period of time. There is also computer software for the ...
... in rabbits suffering from rabies during the last period of their life, the rectal temperature being then ... the temperature is highest during the natural period of activity (night) and lowest during the period of rest (day), but that the mean temperature is ...
... Soon after the emergence of the first animals the Cambrian explosion (a period of unrivaled and remarkable, but brief, organismal diversity documented in ... large-scale changes in gene-frequencies in a population over a long period of time, and is usually taken to refer to events that result in ...
... of the first birds , which suddenly were able to expand their territory into the air, or the development of lung fish during the Devonian period , about 300 million years ago. The dynamics of adaptive radiation is such that, within a relatively short time, many species derive from a single ...
... well cooked meat. Cats are also thought to be possible infection vectors for H5N1 strains of avian flu (Kuiken et al, 2004). The incubation period is 3 to 5 days. Symptoms in animals vary, but virulent strains can cause death within a few days. Avian influenza in humans Of the 15 ...
... today is the result of 3.5 billion years of evolution . Until the emergence of humans, the Earth supported more biodiversity than in any other period in geological history. Since the advent of humans, however, biodiversity has begun a rapid decline, with one species after another suffering ...
... contracted cells are located in the heart wall and operate in concert to develop synchronized beats. This is attributable to a refractory period between twitches. Smooth Muscle (smooth - lacking striations) The stomach, vasculature, and most of the digestive tract are largely composed of ...
... certain size. If the nutrient supply is restricted (after time t = 2 in the diagram, below) and the rate of increase in cell size is slowed, the time period between cell divisions is increased. Yeast cell size mutants were isolated that begin cell division before reaching the normal size ( wee mutants). ...
... the virus is transmitted by direct contact with infected body fluids such as blood. The cause of the index case is unknown. The incubation period of Ebola haemorrhagic fever varies from two days to four weeks. Symptoms are variable too, but the onset is usually sudden and characterised by high ...
... apnea and heart abnormalities. It is impossible to predict the prognosis of an Edward's Syndrome child during pregnancy or the neonatal period . Some children with Edward's Syndrome develop only a small degree, while others gain many of the skills of their Down's Syndrome peers - walking, ...
... (some eugenics programs, including sterilization programs, continued quietly for many more decades, however). Many eugenicists of the previous period engaged in what they at one point labeled "crypto-eugenics," purposefully taking their eugenic beliefs "underground" and becoming highly-respected ...
... experiment was William Dallinger . In the late 19th century , he cultivated small unicellular organisms in a custom-build incubator over a time period of seven years ( 1880 - 1886 ). Dallinger slowly increased the temperature of the incubator from an initial 60 °F up to 158 °F. The early ...
... There have been at least five mass extinctions in the history of life, in which many species have disappeared in a relatively short period of geological time. These are covered in more detail in the article on extinction events . The most recent of these, the K-T extinction 65 million ...
... Hugo de Vries , Carl Correns and Erich von Tschermak . His results were quickly replicated, and genetic linkage quickly worked out. However, a period of tense argument ensued over its significance between William Bateson and Karl Pearson . Ronald Fisher in 1918 used Mendelian genetics as the ...
... are also used. The developing individual is first called a zygote ; as it grows through successive stages inside the female's uterus over a period of 38 weeks, it is called an embryo , then a fetus . At birth, the fully grown fetus, now called a baby , is expelled from the female's body and ...
... that time, led in later years to allegations that his scientific work had been contaminated by Nazi sympathies: his published writing during the Nazi period included support for Nazi ideas of "racial hygiene", couched in pseudo-scientific metaphors. When accepting the Nobel Prize, he apologized for a 1940 ...
... some cases. Dead or dying photobiont cells may be digested by the fungus, but for the most part the photobiont remains healthy during the functional period of the symbiosis with the exchange of nutrients being "voluntary". When seen under magnification, a section through a typical foliose lichen ...
... Life is a multi-faceted concept with no simple definition. Life may refer to: the ongoing process of which living things are a part; the period between the birth and death of an organism ; the condition of an entity that has been born and has yet to die; , that which makes a living ...
... , long-term potentiation ( LTP ) is the strengthening (or potentiation ) of the connection between two nerve cells which lasts for an extended period of time (minutes to hours in vitro and hours to days and months in vivo ). LTP can be induced experimentally by applying a sequence of short, ...
... These stores are generally characterised as of strictly limited capacity and duration, whereas in general stored information can be retrieved in a period of time which ranges from days to years; this type of memory is called long-term memory . It may be that short-term memory is supported by ...
... between microevolution and macroevolution , which is the occurrence of large-scale changes in gene frequencies in a population over a long period of time (and may culminate in the evolution of new species ). Typically, observable instances of evolution are examples of microevolution; for ...
... 1938 however. Warren was director of Natural Sciences for the Rockefeller Foundation at the time and believed that biology was about to undergo a period of significant change given recent advances in fields such as X-ray crystallography . He therefore channeled significant amounts of (Rockefeller ...
... of a species become separated, such as geographically, they face different environments, and tend to develop in different directions. After a long period of time, their traits will have developed along different paths to such an extent that they can no longer interbreed, at which point they are ...
... by finding the difference between the pre ingestion state and the post digestion state. The effect may only be discernible after an extended period of time in which all food and ingestion must be exactly regulated and all waste must be analyzed. The number of active variables involved in this ...
... this locality. The preservation is so perfect that sections of these ancient plants show the individual cells within the plant tissue. The Devonian period also saw the evolution of what many believe to be the first modern tree, Archaeopteris . This fern-like tree combined a woody trunk with the ...
... this locality. The preservation is so perfect that sections of these ancient plants show the individual cells within the plant tissue. The Devonian period also saw the evolution of what many believe to be the first modern tree, Archaeopteris . This fern-like tree combined a woody trunk with the ...
... those changes. Population dynamics is the dominant branch of mathematical biology , which has a history of more than 200 years. The early period was dominated by demographic studies such as the work of Benjamin Gompertz and Pierre Franois Verhulst in the early 19th century, who refined ...
... is that it seems as though proprioceptive sensory impressions disappear, just as a scent seems to disappear when a person smells it for a prolonged period of time. One practical advantage of this is that unnoticed actions or sensation continue in the background while an individual's attention can move ...
... (the most common example is eating beans with rice) but nutritionists now know that the benefits of protein combining can be achieved over a longer period of time. Ovo-lacto vegetarians usually do not have this problem, since egg's white and cow's milk contain all essential amino acids. Peanuts , ...
... an example: Suppose the average length of a limb on a particular species grows 50 centimeters (a large amount) over 70000 years (a geologically short period of time). If the average generation is 7 years, then the given timespan corresponds to 10000 generations. Thus, on average, the limb grows at the ...
... Camphill Villages and eight Colleges providing a home for more than 1000 residents. Social threefolding Steiner the Activist For a period after World War I, Steiner was extremely active and well-known in Germany in part because in many places he gave lectures on social questions. A ...
... in rural or forest areas and in towns. Disease outbreaks in towns and non-native people are usually more serious. After a 3 to 6 day incubation period the typical symptoms that arise are fever, muscle aches, headache and backache. Other symptoms may include a red tongue, flushed face, and reddening ...
... wavelength and frequency, it follows that short wavelengths are more energetic than long wavelengths. See Also Waves frequency period amplitude External link Conversion: Wavelength to frequency and vice versa - The calculator Wavelength is the title of a ...
... of any value which does not include internal structure, histology and embryology in its scope. The real dawn of zoology after the legendary period of the Middle Ages is connected with the name of an Englishman , Edward Edward Wotton , born at Oxford in 1492 , who practised as a physician ...
... the average amount of diabetic control over a period of about 3 months (the average red blood cell ... as hypoglycaemia and usually happens over a period of days rather than hours or minutes. If left ... see what levels they are achieving over a given period of time. There is also computer software for the ...
... in rabbits suffering from rabies during the last period of their life, the rectal temperature being then ... the temperature is highest during the natural period of activity (night) and lowest during the period of rest (day), but that the mean temperature is ...
... Soon after the emergence of the first animals the Cambrian explosion (a period of unrivaled and remarkable, but brief, organismal diversity documented in ... large-scale changes in gene-frequencies in a population over a long period of time, and is usually taken to refer to events that result in ...
... of the first birds , which suddenly were able to expand their territory into the air, or the development of lung fish during the Devonian period , about 300 million years ago. The dynamics of adaptive radiation is such that, within a relatively short time, many species derive from a single ...
... well cooked meat. Cats are also thought to be possible infection vectors for H5N1 strains of avian flu (Kuiken et al, 2004). The incubation period is 3 to 5 days. Symptoms in animals vary, but virulent strains can cause death within a few days. Avian influenza in humans Of the 15 ...
... today is the result of 3.5 billion years of evolution . Until the emergence of humans, the Earth supported more biodiversity than in any other period in geological history. Since the advent of humans, however, biodiversity has begun a rapid decline, with one species after another suffering ...
... contracted cells are located in the heart wall and operate in concert to develop synchronized beats. This is attributable to a refractory period between twitches. Smooth Muscle (smooth - lacking striations) The stomach, vasculature, and most of the digestive tract are largely composed of ...
... certain size. If the nutrient supply is restricted (after time t = 2 in the diagram, below) and the rate of increase in cell size is slowed, the time period between cell divisions is increased. Yeast cell size mutants were isolated that begin cell division before reaching the normal size ( wee mutants). ...
... the virus is transmitted by direct contact with infected body fluids such as blood. The cause of the index case is unknown. The incubation period of Ebola haemorrhagic fever varies from two days to four weeks. Symptoms are variable too, but the onset is usually sudden and characterised by high ...
... apnea and heart abnormalities. It is impossible to predict the prognosis of an Edward's Syndrome child during pregnancy or the neonatal period . Some children with Edward's Syndrome develop only a small degree, while others gain many of the skills of their Down's Syndrome peers - walking, ...
... (some eugenics programs, including sterilization programs, continued quietly for many more decades, however). Many eugenicists of the previous period engaged in what they at one point labeled "crypto-eugenics," purposefully taking their eugenic beliefs "underground" and becoming highly-respected ...
... experiment was William Dallinger . In the late 19th century , he cultivated small unicellular organisms in a custom-build incubator over a time period of seven years ( 1880 - 1886 ). Dallinger slowly increased the temperature of the incubator from an initial 60 °F up to 158 °F. The early ...
... There have been at least five mass extinctions in the history of life, in which many species have disappeared in a relatively short period of geological time. These are covered in more detail in the article on extinction events . The most recent of these, the K-T extinction 65 million ...
... Hugo de Vries , Carl Correns and Erich von Tschermak . His results were quickly replicated, and genetic linkage quickly worked out. However, a period of tense argument ensued over its significance between William Bateson and Karl Pearson . Ronald Fisher in 1918 used Mendelian genetics as the ...
... are also used. The developing individual is first called a zygote ; as it grows through successive stages inside the female's uterus over a period of 38 weeks, it is called an embryo , then a fetus . At birth, the fully grown fetus, now called a baby , is expelled from the female's body and ...
... that time, led in later years to allegations that his scientific work had been contaminated by Nazi sympathies: his published writing during the Nazi period included support for Nazi ideas of "racial hygiene", couched in pseudo-scientific metaphors. When accepting the Nobel Prize, he apologized for a 1940 ...
... some cases. Dead or dying photobiont cells may be digested by the fungus, but for the most part the photobiont remains healthy during the functional period of the symbiosis with the exchange of nutrients being "voluntary". When seen under magnification, a section through a typical foliose lichen ...
... Life is a multi-faceted concept with no simple definition. Life may refer to: the ongoing process of which living things are a part; the period between the birth and death of an organism ; the condition of an entity that has been born and has yet to die; , that which makes a living ...
... , long-term potentiation ( LTP ) is the strengthening (or potentiation ) of the connection between two nerve cells which lasts for an extended period of time (minutes to hours in vitro and hours to days and months in vivo ). LTP can be induced experimentally by applying a sequence of short, ...
... These stores are generally characterised as of strictly limited capacity and duration, whereas in general stored information can be retrieved in a period of time which ranges from days to years; this type of memory is called long-term memory . It may be that short-term memory is supported by ...
... between microevolution and macroevolution , which is the occurrence of large-scale changes in gene frequencies in a population over a long period of time (and may culminate in the evolution of new species ). Typically, observable instances of evolution are examples of microevolution; for ...
... 1938 however. Warren was director of Natural Sciences for the Rockefeller Foundation at the time and believed that biology was about to undergo a period of significant change given recent advances in fields such as X-ray crystallography . He therefore channeled significant amounts of (Rockefeller ...
... of a species become separated, such as geographically, they face different environments, and tend to develop in different directions. After a long period of time, their traits will have developed along different paths to such an extent that they can no longer interbreed, at which point they are ...
... by finding the difference between the pre ingestion state and the post digestion state. The effect may only be discernible after an extended period of time in which all food and ingestion must be exactly regulated and all waste must be analyzed. The number of active variables involved in this ...
... this locality. The preservation is so perfect that sections of these ancient plants show the individual cells within the plant tissue. The Devonian period also saw the evolution of what many believe to be the first modern tree, Archaeopteris . This fern-like tree combined a woody trunk with the ...
... this locality. The preservation is so perfect that sections of these ancient plants show the individual cells within the plant tissue. The Devonian period also saw the evolution of what many believe to be the first modern tree, Archaeopteris . This fern-like tree combined a woody trunk with the ...
... those changes. Population dynamics is the dominant branch of mathematical biology , which has a history of more than 200 years. The early period was dominated by demographic studies such as the work of Benjamin Gompertz and Pierre Franois Verhulst in the early 19th century, who refined ...
... is that it seems as though proprioceptive sensory impressions disappear, just as a scent seems to disappear when a person smells it for a prolonged period of time. One practical advantage of this is that unnoticed actions or sensation continue in the background while an individual's attention can move ...
... (the most common example is eating beans with rice) but nutritionists now know that the benefits of protein combining can be achieved over a longer period of time. Ovo-lacto vegetarians usually do not have this problem, since egg's white and cow's milk contain all essential amino acids. Peanuts , ...
... an example: Suppose the average length of a limb on a particular species grows 50 centimeters (a large amount) over 70000 years (a geologically short period of time). If the average generation is 7 years, then the given timespan corresponds to 10000 generations. Thus, on average, the limb grows at the ...
... Camphill Villages and eight Colleges providing a home for more than 1000 residents. Social threefolding Steiner the Activist For a period after World War I, Steiner was extremely active and well-known in Germany in part because in many places he gave lectures on social questions. A ...
... in rural or forest areas and in towns. Disease outbreaks in towns and non-native people are usually more serious. After a 3 to 6 day incubation period the typical symptoms that arise are fever, muscle aches, headache and backache. Other symptoms may include a red tongue, flushed face, and reddening ...
... wavelength and frequency, it follows that short wavelengths are more energetic than long wavelengths. See Also Waves frequency period amplitude External link Conversion: Wavelength to frequency and vice versa - The calculator Wavelength is the title of a ...
... of any value which does not include internal structure, histology and embryology in its scope. The real dawn of zoology after the legendary period of the Middle Ages is connected with the name of an Englishman , Edward Edward Wotton , born at Oxford in 1492 , who practised as a physician ...
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Other TagsAPIAPIAPIAPIAPIAPIAPIMPAMPAMPAMPAMPAMPAMPAMPAnineninenine[1] AdCare Health Systems Completes Private Placement to Fund Aggressive Growth Initiatives[0] Bone Marrow Transplants May Cure Sickle Cell in Adults [1] All-New TendoFlex(TM) Revolutionizes Stretching and Core Strengthening[0] The Kenneth Rainin Foundation Awards $457,000 in Grants to Support Dance, Theater, Film and Early Literacy in the San Francisco Bay Area[0] Hoag Hospital Named One of the Nation's Top Cardiovascular Hospitals by Thomson Reuters
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