What is the definition of activation energy?

Activation energy - is the minimum quantity of energy that the reacting species must possess in order to undergo a specified reaction.

1. is through mitosis2.dna replication

Because the earth is not round ,but it may seem round when viewed from ,our planet but true some points earth is not round was an oblate spheroid -a square that it squashed as globe however is not even a perfect oblate spheroid.in fact isaac newton's first proposed that earth was not perfectly round but it was an oblate spheroid instead.that mean a square that is squashed as its poles and swollen at the