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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.
(i) Effect on Human Health: Air pollution causes many respiratory problems in human being. (1) Dust, soot and smog causes several respiratory troubles such as bronc
Question 1 List any five differences between DNA and RNA 2 What is tandemly repeated DNA? Describe its types 3 What is rolling circle replication of DNA? How does it take place
This innovative, pacemaker-based approach to the treatment of patients with heart failure who have a wide QRS complex (>140 ms) on 12-lead ECG aims at providing electromechanical c
MAJOR EVENTS DURING GASTRULATION - 1. There is rearrangement of cells due to morphogenetic movement of the cells of blastoderm. 2. The three primary germ layer g
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Q. What are some diseases caused by abnormal GH secretion by the hypophysis? In childhood deficient GH secretion may lead to delayed growth and in severe cases to nanism that i
Structure of human testis: The male reproductive system consists of a pair of testis. Testis are male reproductive organs and produce (male gametes) sperms and also secrete
draw a sponge and label
reproduction mode
Peculiarities of Mitosis - Cleavage From the following you will learn that the mitosis in the phase of cleavage has some striking peculiarities: a) Synchronization of cell
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