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 is: \[\begin{matrix} Bryophytes & \to & Pteridophytes \\ \left( \begin{align} & \,\,\,Thalloid\,no \\ & vascular\text{ }tissue \\ \end{align} \right) & {} & \left( \begin{align} & \,\,\,\,\,\,Differentiation\text{ }in \\ & vascular\text{ }tissue\text{ }begins \\ \end{align} \right) \\ \begin{align} & \,\,\,\,\,\,\,Gymnosperms \\ & (no\text{ }fruit\text{ }formation) \\ \end{align} & \to & \begin{align} & \,\,Angiosperms \\ & (fruit\text{ }present) \\ \end{align} \\ \end{matrix}\]
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