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Explain how early RNA molecules might have been able to respond to natural selection.
Every RNA molecule might have competed with slightly dissimilar RNA molecules for nucleotides. An RNA molecule that was more successful in getting nucleotides would have an advantage, and it would pass that advantage on to the new RNA molecules it formed by replicating.
In the previous section we discussed the concept of species in detail and concluded that the concept of biological species and Mayr's definition of species have a wide acceptance a
How to find the number of pair of alleles involved in polygenic inheritance using the number of phenotypical forms of the trait they condition? Considering the "p" number of th
How does the presence of exoskeleton explain the general small size of arthropods? As they have exoskeleton and periodic ecdysis, the growth of arthropods is limited to avoid t
Define Changes in Gluten Proteins during Dough Formation? Initially, gluten is formed when flour and water are mixed together. The proteins in the flour, glutenin and gliadin c
Q. What are the main biological functions of water? Water is the basic solvent for chemical reactions of living beings; it is the main means of substance transportation in the
Erythropoietin (EPO) A. acts by increasing the production of red blood cells by cells in the bone marrow. B. is secreted by peritubular interstitial cells of the kidney cort
In developing countries because of poor compliance, poverty, ignorance, primary and secondary prevention strategies are difficult to implement properly. Also in western countries (
The major component of food is protein. The proteins ingested as part of our diet are not the same proteins required by the body, nor can large molecules be absorbed from the gut.
EFFECT ON BODY - 1 . CANCER - Benzpyrene present in tobacco is carcinogenic , responsible for lung cancer. Tobacoo chewing also produce oral cancer. Smoking m
Some of the situations that concern ethical decisions in nutrition care are as follows: Difficulty of adequate nutritional support of malnourished patients, a) A problem
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