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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.
Cnidaria - Protozoa The mature medusoid jellyfishes like Aurelia are the sexual stages. Sperms and eggs produced in the dissimilar (male and female) individuals ale released i
Q. Why is the cerebellum more developed in mammals that fly or jump? The cerebellum is the main brain structure that coordinates the movement and the equilibrium of the body. F
Explain about lyophilic If the affinity between the dispersed phase and the medium is high, the dispersed phase is said to be lyophilic (solvent loving) or hydrophilic, in the
Water loss during excretion In terrestrial animals body water is also lost during excretion of nitrogenous wastes. A number of physiological adaptations have taken place to mi
Indications For Surgery : The normal aortic valve area in the adult is about 3-4 cm2. Significant symptoms occur when the valve area is seduced to 1/4"' the normal area
Define Behaviour modification - combat from obesity Problem? It is very important. A heavy parental hand and parent attitude and behaviours towards child's eating, interferes i
What are the three main types of RNA? What is meant by heterogeneous RNA? Messenger RNA, or mRNA, transfer RNA, or tRNA, and ribosomal RNA, or rRNA, are the three main kinds of
Define Herbals - Old books about Plants? During the Middle Ages, following the decline of the Greek and Roman civilisations, little significant botanical progress was made. The
In patients with left ventricular failure and reduced ejection fractions, the risk of LV thrombus formation and systemic arterial embolization appears to be primarily in patients
Q. What is the function of the vitellus in the vertebrate egg? How are these eggs classified according to the amount of vitellus within them? Vitellus (yolk) is the nutritive m
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