Question

Biosystematics aims at:A. Identification and arrangement of organisms on the basis of their cytological characteristics.
B. The classification of organisms based on broad morphological characters.
C. Delimiting various taxa of organisms and establishing their relationships.D. The classification of organisms based on their evolutionary history and establishing their phylogeny on the totality of various parameters from all fields of study.

Answer 1

Option D is correct
Systematics = taxonomy + evolutionary (phylogenetical) relationships

Answer 2

The aim of biosystematics is to Delimiting the various taxa of the organisms and to establish their relationship.

The term Biosystematics can be defined as a 'taxonomy of the living populations'.

As per the current day classification of the plants, the species is considered to be a basic unit.

Thus from the question, option c Delimiting the various taxa of the organisms and to establish their relationship is the right answer to the question.