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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.
What are abiotic factors? Abiotic factors are the nonliving elements that constitute a given environment, as light, temperature, minerals, gases, water, atmospheric pressure, e
Are nematodes exclusively parasites? There are parasitic roundworms, containing parasites of plants, but there are also free-living nematodes.
Define Diagnostic Criteria for Bulimia Nervosa? 1. Recurrent episodes of binge eating. An episode of binge eating is characterized by both of the following a) Eating, in a d
Slow creeping
What a test tube brush and how is it used? It is a method, made with nylon bristles attached to a twisted-wire shaft, used to knock the bottoms out of test tubes.
describe an experiment to test if RNA is a transcript of DNA
When the product of a metabolic pathway decreases the rate limiting earlier in the pathway it is called?
Q. Explain about Non ionising radiation? Non ionising radiation include infrared and UV rays. Lethal effect is through generation of heat and DNA damage. Penetration is low but
What is xaxim? Most pteridophytes have subterraneous stems parallel to the substrate known as rhizomes. Xaxim is a type of pteridophyte with an aerial stem generally perpendicu
CHLOROPLASTS Schimper (1883) coined the term chloroplastid for green plastids. Mayer called them Autoplast. Chloroplast name proposed by Erera. Green plastids wi
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