In the question, there is a timeline given based on the fossils evidence and on the base of this timeline, it is given that the earth formed around 4.5 Billion years ago. Soon after the earliest water, the first living unicellular single-celled organism found which is dated around 4.1 billion years ago.
It has appeared soon after the earth formed itself and after a billion years later the first photosynthetic organism occurred.
The plant cell is able to withstand the expansion of the central vacuole as the result of the rigid cell wall which it possess. The plant cell wall provide a rigid structure which support the activities of the cell.
