A) due to long periods of evolutionary changes
B) due to abrupt mutations
C) suddenly on earth
D) by seed dispersal
Correct Answer: A
Solution :
Diversification in plants life appeared due to long periods of evolutionary changes. The evolutionary changes sequence k'. \[\begin{align} & \,\,\,\,\,\,\,\,\,Bryophytes\,\,\,\,\,\,\,\,\,\to \,\,\,\,\,\,\,\,\,\,Pteridophytes\,\,\,\,\,\,\,\to \\ & \left( \begin{align} & \,\,\,\,\,Thalloid\,no \\ & vascualr\,tissue \\ \end{align} \right)\left( \begin{align} & \,\,\,\,\,\,\,Differentiation\,in \\ & vascular\,tissue\,begins \\ \end{align} \right) \\ & \,\,\,\,\,\,Gymnosperms\,\,\,\,\,\,\,\,\,\,\to \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Anigosperms \\ & \,\,\,\,(no\,fruit\,formation)\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,(fruit\,\,present) \\ \end{align}\]
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