Biology Doubt

[Catherine]

Q:What r d basic events in evolution?
They asked in our preboard n i'm not sure of d answer....................sum1 help

[sairam]

The first basic event in evolution is the DNA copying which is bound with erors. Since such bio-chemical reactions are completely not reliable, mistakes accompanied by crossing over & recombination of characters take place during fretilization giving rise to evolution.

[Apeksha]

It is explained well in the refrence book "S chand" of biology
you can refer to it .

all the best