Q. Which of the following kingdoms have no well defined boundaries?
A) Plantae
B) Protista
C) Monera
D) Algae
Explanation
Protista. The kingdom- Protista was proposed by Ernst Haeckel (1866). Although all single celled eukaryotes are placed in kingdom-Protista yet its boundaries are not well defined
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.