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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.
Embryology This is the study of growth, fertilization, division or differential of the zygote into embryo of early development of living beings before the attainment of structure
What is folic acid? Why is the anemia caused by deficiency of folic acid known as megaloblastic anemia? The folic acid (when ionized it is known as folate) is a coenzyme that
Green leaves give off oxygen in sunlight Place some water weed under a funnel in a beaker of water reverse a test tube full of water over the tube of the funnel. Leave the appa
When an individual is exposed to foreign serum antigen then a combination of symptoms are produced which is known as serum sickness.
why obelia is of special interest in zoology
What is population growth rate? Population growth rate (PGR) is the percent variation among the number of individuals in a population at two different times. Thus the populatio
The major air pollutants are: (i) Carbon monoxide, CO (ii) Nitrogen oxides, (NO)x (iii) Sulphur oxide, (SO)x (iv) Ground level ozone (O3) (v) Hydrocarbons (
How does the addition of a watery secretion to the contents of the gut help in the process of digestion?
In glycoproteins, two main parts of oligosaccharide linkages exist: a) An O-linked oligosaccharides attached to the protein by O-glycosidic bonds, to the OH groups of serine or
Locomotion in Echinodermata Locomotion in echinoderms is accomplished through a unique canalicular system which is termed as the water-vascular system. This system is charact
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