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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.
How does a DNA vaccine prevent future disease? A DNA vaccine having DNA from a pathogen but cannot cause disease. When the vaccine is injected into a patient, the DNA directs t
Salt Glands in Birds and Reptiles Marine reptiles for example, iguanas, estuarine sea turtles, crocodiles, sea snakes and marine birds like the marine teleosts do not produce
the Mendel's first law? A Mendel's first law postulates that a characteristic (trait) of an individual is always determined by two factors, one inherited from the mother and th
Q. Symptoms of dyspepsia? The life style modification in terms of work schedules, eating behaviour like consuming meals when extremely tired, quitting alcohol and smoking would
Organ level -Level of body organization When organs work together to perform a specific function we have the highest level of body organization i.e. the organ system level of bo
What is Coevolution ? There is considerable evidence that supports an interesting theory that two individual species can affect each others evolution in reciprocal fashion. In
Criteria for Diagnosis of Respiratory Failure PaO 2 , PaCO 2 , > 50 mm Hg. Vital Capacity Respiration > 30/min or below 8/min.
Define Fish as a rich source of protein? The edible portion is skeletal muscles of the body. Even though the skeletal muscles of different animals are basically similar, fish s
Sally Subcloner wants to clone a fragment into pUC19 (Map above – From New England Biolabs). Her fragment was a protein coding gene of 2.7 kb, and had XhoI sites on either end (and
N A TURA L CONTROL OF POPULATION GROWTH - 1 . Biotic potential - It is capacity of population to increase its number by reproduction. For all animals, it is v
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