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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.
Chromosomes Karl Nageli and Hofmeister observed chromosomes in pollen mother cells of Tradescantia. Chromosome name proposed by Waldeyer. During cell division,
Explain Dehydration Dehydration is one of the ancient food processing techniques. Dehydration means to completely remove water under controlled conditions, in such a way
Pericardiocentesis It is removal of fluid form the pericardial sac. It is a specialized procedure done n ICU or cardiac cath lab or OT. A 16 or 18 gauge needle is inserted
sturucture explain
Energy Storage As we said above, food intake and energy expenditure for animals is approximately equal. If energy expenditure exceeds food intake, then the excess energy is t
Define Altered Glucose Metabolism - Nutrition during Stress? Blood glucose levels are generally elevated in the infected patient but plasma insulin levels are normal or even hi
Define about Iodine Metabolism? Now, we will very briefly study how iodine is absorbed, distributed in the body and ' excreted out. Like other nutrients, dietary iodide is eith
10 mcq question in the topic of plants of 9th standard
Q. What are the three fundamental sexual life cycles studied in Biology? Which of them corresponds to metagenesis? Which of them is the human life cycle? Sexual reproduction ma
Vitamin D (Calciferol - vitamin D2) The main forms are Vitamin D2 (ergocalciferol-plant origin) and vitamin D3 (cholecalciferol-animal origin). Vitamin D2 forms colourless, aci
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