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versus in Biological Definition

DNA

... 6.2 Circular DNA 6.3 Great length versus tiny breadth 6.4 Different helix geometries ... recombination in linear DNA. Great length versus tiny breadth The narrow breadth of the double ... from the lower cost of replicating one strand versus two. The history of DNA research ...

Warm-blooded

... showTocToggle("show","hide") 1 Mechanisms 2 Warm-blooded versus cold-blooded 3 In between cold and warm blooded 4 See also ... sweating (to increase heat loss through evaporation ). Warm-blooded versus cold-blooded Biochemical processes are heat dependent. The rule of ...

Genetic drift

... showTocToggle("show","hide") 1 Allele frequencies 2 Drift versus selection 3 Genetic drift in populations 4 See also 5 ... generations, where N e is the effective population size. Drift versus selection Genetic drift and natural selection rarely occur in ...

Parthenogenesis

... . Contents showTocToggle("show","hide") 1 Asexual versus sexual reproduction 2 Parthenogenesis 3 Gynogenesis 4 ... 5 See also 6 References 7 External links Asexual versus sexual reproduction Asexuality is relatively rare among multicellular ...

Active transport

... sets the normal or resting concentration of this important second messenger . But the ATPase exports calcium ions more slowly: only 30 per second versus 2000 per second by the exchanger. The exchanger comes into service when the calcium concentration rises steeply or "spikes" and enables rapid ...

Cladistics

... knowledge of characters, and these may invalidate cladograms. There is also concern that use of widely different data sets, for instance structural versus genetic characteristics, may produce widely different trees. However, by and large the phylogenetic approach to systematics has proven useful and ...

Culture

... related). That this capacity for symbolic thinking and social learning is a product of human evolution confounds older arguments about nature versus nurture . Thus, Clifford Geertz (1973: 33 ff.) has argued that human physiology and neurology developed in conjunction with the first cultural ...

Down syndrome

... meals. Individuals with Down Syndrome share many of the characteristics of their parents, with an average life expectancy of 49 years in the USA versus 77 years for the whole population ( [2] ) thanks mainly to improved diet, housing, health and social care. Many children and adults with Down's ...

Enzyme

... run in the same direction as they would without the enzyme, just more quickly; the concept is similar to the likelihood of a ball rolling down a hill versus the likelihood of it rolling up the hill. Catalysis by an enzyme is analogous to removing a pebble that is stopping the ball from rolling down the ...

Human Genome Project

... and proceeded at a faster pace and at a fraction of the cost of the taxpayer-funded project (approximately $3 billion of taxpayer dollars versus about $300 million of private research funding ). Celera initially planned to patent all genes found, unlike the gene sequences found by the ...

Neutral theory of molecular evolution

... on the initial publication of Kimura's theory, in which discussion largely revolved around the relative percentages of alleles that are "neutral" versus "non-neutral" in any given genome. Contrary to the perception of many onlookers, the debate was not about whether or not natural selection acts at ...

Olfaction

... of odor character from molecular structure. Journal of Theoretical Biology, 216, 367-385. Stopfer, M, Jayaraman, V, Laurent, G (2003) Intensity versus Identity Coding in an Olfactory System, Neuron 39, 991-1004. Stopfer, M. and Laurent, G. (1999). Short-term memory in olfactory network dynamics, ...

Selective serotonin reuptake inhibitor

... According to this argument, societal pressures have created a precedent for the pursuit of "normal" mental or emotional functioning by chemical means versus a more holistic approach (diet, exercise, sleep, stress reduction, etc). Furthermore, in late 2004 was much media attention given to a proposed link ...
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