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Assimilation is the process of absorption of vitamins, minerals, and other chemicals from food as part of the nutrition of an organism. In humans, this is always done with a chemical breakdown ( enzymes and acids ) and physical breakdown (oral mastication and stomach churning).
Waddington called the effect he had seen "genetic assimilation". His explanation was that it was caused by a process he called "canalization".He compared embryonic development to a ball rolling down a slope in what he called an epigenetic landscape, where each point on the landscape is a possible state of the organism (involving many variables).
Among aquatic and terrestrial ecosystems, patterns have been identified that can account for this variation and have been divided into two main pathways of control: top-down and bottom-up. [ 22 ] [ 23 ] The acting mechanisms within each pathway ultimately regulate community and trophic level structure within an ecosystem to varying degrees. [ 24 ]
Strong robustness up to a limit, with little robustness beyond, is a pattern that could increase evolvability in a fluctuating environment. [17] Canalisation of a large set of genotypes into a limited phenotypic space has been suggested as a mechanism for the accumulation, in a neutral manner, of mutations that could otherwise be deleterious. [18]
Assimilation (biology) the conversion of nutrient into the fluid or solid substance of the body, by the processes of digestion and absorption; Assimilation (phonology), a linguistic process by which a sound becomes similar to an adjacent sound; Data assimilation, updating a numerical model with observed data
In developmental biology, pattern formation refers to the generation of complex organizations of cell fates in space and time. The role of genes in pattern formation is an aspect of morphogenesis , the creation of diverse anatomies from similar genes, now being explored in the science of evolutionary developmental biology or evo-devo.
Hundreds of prisoners in California are helping battle the LA wildfires. Some earn $26.90 per 24-hour shift, or just over $1 an hour.
Nitrate requires a redox reaction for assimilation but is more abundant so most phytoplankton have adapted to have the enzymes necessary to undertake this reduction (nitrate reductase). There are a few notable and well-known exceptions that include most Prochlorococcus and some Synechococcus that can only take up nitrogen as ammonium. [42]