What is one of the drawbacks of the Linnaean system of classification?

The correct answer is : lack of molecular evidence.

Explanation:

The Linnaean classification system was depended on clear physical qualities. It comprises of a chain of command of taxa, from the kingdom on the top to the species as more specific taxa. Every species is given a one of a kind two-word Latin name. The system is based completely on physical characteristics of organisms, due to lacking the proper technology to investigate the molecular data of animals.

Thus, the correct answer is : lack of molecular evidence.