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Q. Which type of cell came first in evolution - the eukaryotic cell or the prokaryotic cell?
This is an interesting problem of biological evolution. The majorly accepted hypothesis asserts that the prokaryotic cell, the simpler cell, appeared earlier in evolution than the more complex eukaryotic cell. The endosymbiotic hypothesis, for instance, affirms that aerobic eukaryotic cells appeared from the mutualist ecological interaction between aerobic prokaryotes and primitive anaerobic eukaryotes.
Reproduction Living things do not arise spontaneously. They arise only from pre-existing living things This is one of the fundamental tenets of biology. The ability of an orga
Q. What are the hormones produced by the ovaries and the testicles? The testicles make androgenic hormones, the major of them being testosterone. The ovaries produce progestero
Explain what happens when the cell membrane or plasma membrane ruptures or breaks down? Ans) When cell membrane ruptures Ions leek out and unless repaired in time the cell will
Can the amount of available energy in a given trophic level be larger than the available energy in inferior trophic levels? What does that condition means to the conformation of th
Define the Functions of Vitamin A? Vitamin A (retinol) is an essential nutrient needed in small amounts by humans for the normal functioning of the visual system, growth and de
Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4 Various protein-codi
Who was Charles Darwin? The Charles Darwin was an English naturalist born in 1809 and considered the father of the theory of evolution. By the end of the year 1831, before turn
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Explain the Etiology and Clinical Features of Parkinson's disease? The cause of Parkinson's is unknown. Genetic predisposition (in most cases the reason for the death of these
Is the effect of genetic drift likely to be the same in pop 1 and pop 2? How are genetic drift and pop size related? When there is strong selection against the homozygous recessive
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