Degeneracy
Degeneracy simply means that most of the amino acids produced during protein synthesis from DNA is coded by more than one codon. A codon is a sequence of 3 <span>nucleotides that codes for a specific amino acid.
Because more than 1 codon can produce the same amino acid, the chances of having the synthesis of proteins affected by mutations (i.e. point mutations) is decreased. For example, if the codon with the nucleotide series GAA, which codes for the amino acid glutamate, becomes the codon GAG, the codon will still produce glutamate because the code is degenerate. </span>
Extraction of aluminium metal takes place in three main stages¿mining of bauxite ore, refining the ore to recover alumina and smelting alumina to produce aluminium. Bauxite is mined by surface methods (open-cut mining) in which the topsoil and overburden are removed by bulldozers and scrapers.
Answer:
The body regulates those levels in an example of homeostasis. When levels decrease, the parathyroid releases hormones. If calcium levels become too high, the thyroid helps out by fixing calcium in the bones and lowering blood calcium levels. The nervous system helps keep homeostasis in breathing patterns.
Explanation:
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Archaebacteria are like Eubacteria, which are just able to survive dangerous conditions, such as high salinity, extreme temperatures, and no oxygen.
Eubacteria are your garden-variety prokaryotic organisms that can cause the common cold and make bread rise, which don't have nuclei.
Fungi are similar to plants in the way that their cells are structured, except they have cell walls made of <em>chitin</em>, instead of cellulose like Plants. They decompose food and eat it using chemosynthesis, breaking it down into organic matter, which allows for the cycling of materials through a food chain.
Protista is really tough. You see, protists are basically a fancy word scientists picked instead of "miscellaneous", because there are plant-like, fungi-like, and animal-like protists. They really have no defining characteristics to speak of except that they have weird quirky qualities that don't allow them to fit in any groups.
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4680 years
1 x .5 = .5
.5 x .5 = .25
.25 x .5 = .125
You multiplied 3 times, so 3 times 1,620 is 4,680.