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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.
Trophic structure Organisms in a community are closely interrelated with each other through feeding relationships. Another aspect which is quite obvious in a community is th
What are passive and active immunization? According to the duration of the protection how do these types of immunization differ? Active immunization is that in which an antigen
Explain about Phytopinax written by Caspar Bauhin? A significant contribution to taxonomy was made at this time by Caspar Bauhin. His 'Phytopinax' (1596) described 2700 species
N e c r otic enteritis It can be designated as enterotoxaemia of chickens, turkeys and ducks caused by Clostridium perfringens. The toxin released by this spore-bearing a
Thus, the objectives of the nutritional care process should include the following points: 1. Restoration of good nutritional status with dietary modifications and counseling.
Q. What is Inflammatory Bowel Disease? Inflammatory bowel disease is a general term used to refer to chronic inflammatory condition of the intestine. It is applied to three con
Diabetic foot are impaired blood supply to foot Diabetic foot are impaired blood supply to foot i.e. vasculopathy. This leads to ischaemia which in turn leads to delayed or non
1. DNA damaga can be spontaneous or can be 'Induced by external agents a. What are 'spontaneous' mutations? Give examples of causes of spontaneous mutations and the kinds od DNA
Quantitative changes The quantitative changes in the availability of the active biomolecules occur in order to compensate for the loss of efficiency of the system caused by th
PHYSICAL STATE OF PROTOPLASM Several theories have been given about its physical structure - (i ) Granular Theory (Proposed by Altman, Hanstein, 1886) - Granules embed
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