Q1:

S₁: Palaeobotany is the study of fossil plants preserved in rocks dating back in millions of years.

P : Records of the history of the world are contained in fossils.

Q : Through the ages, plants have evolved from simple to more complex forms.

R : First there were water plants then land plants appeared during the Paleozoic era.

S : But since the fossil remains appear locked in rock layers, they are closely related to the geologist area of investigation.

S₆: The fossil plants indicate the age of the rock, and also point to facts regarding climate, temperature and topography.

The Proper sequence should be:

Question

S₁:	Palaeobotany is the study of fossil plants preserved in rocks dating back in millions of years.
P :	Records of the history of the world are contained in fossils.
Q :	Through the ages, plants have evolved from simple to more complex forms.
R :	First there were water plants then land plants appeared during the Paleozoic era.
S :	But since the fossil remains appear locked in rock layers, they are closely related to the geologist area of investigation.
S₆:	The fossil plants indicate the age of the rock, and also point to facts regarding climate, temperature and topography.

The Proper sequence should be:

Ordering of Sentences