Question

Diversification in plant life appeared initially –
A. Due to long periods of the evolutionary change
B. Due to abrupt mutations
C. Suddenly on the earth
D. By seed dispersal

Answer 1

Diversification is an important part of evolution. It plays a major role in the changes that occurred in plant life. The diversification does not occur by seed dispersion but it was first developed from a thalloid.

Complete answer: Plants first grew as thalloid without any roots, stems, leaves, and developed non-vascular plants. No vascular tissues were present. The occurrence of such evolutionary changes took a longer period of time. It is defined as the action of the diversifying system or becoming more diverse. The evolution took place from thalloid forms which were proved by the fossil forms.
The evolution took place through various complexities. It first appeared in the freshwater photosynthetic autotrophs or algae which later developed into some free sporing plants like a fern. Ferns later developed into terrestrial bryophytes, then to pteridophytes. At last, it developed into non-vascular gymnosperms and flowering plants or angiosperms.
The mutation is the cause of the evolution while further, it leads to diversification.
Diversification didn’t appear on earth suddenly Earth but was a series of evolutionary changes that took place for a period of time. The diversification does not occur by seed dispersion but it was first developed from a thalloid from which has no seeds, roots, stems, and leaves. It was the initial stage of diversification.
So, option A is the correct answer.

Note: The evolution has taken plant life way more further. It has resulted in a range of varieties and complexities, that is, from algal blooms to freshwater algae, ferns, terrestrial bryophytes, to gymnosperms and angiosperms. Plants have gone through certain evolutionary changes to be established as flowering plants.