Question

Which of the following kingdoms has no well-defined boundaries?
A. Monera
B. Protista
C. Fungi
D. None of these

Answer 1

The five kingdoms classification are Monera, Protista, Fungi, Animalia, Plantae. Organisms are divided on the basis of different characters like cell boundary, shape, type of nutrition, etc. Protista has no well-defined boundaries.

Complete answer:
The Protista is a simple eukaryotic organism, composed of a single cell or colony of similar cells. It lives in water, in moist terrestrial habitats, and as parasites and other symbioses in the bodies of multicellular eukaryotes. Protista are not ancestral basal Protists are the one of them. The Protista is a category of eukaryotes, not closely related to each other and not sharing many characteristics, but not fitting any other kingdom of life.
In option A: Monera has a cell wall. It is made up of polysaccharides i.e. peptidoglycan this option is not correct
In option B: Fungi have a cell wall. It is made up of chitin this option is not correct,
In option D: This is not the correct option.

So, the correct answer is C.

Additional information:
The Protista was divided into three main categories: plant-like algae, animal-like protozoans, and fungus-like slime molds. This classification being in many elementary textbooks however, current molecular evidence indicates that these are not natural groups related by common descent, but groups with merely superficial, deceptive similarities.

Note:
In the above we detailed the evolution of organisms and geology in different eras according to geological time scale. It showed us the history of developed organisms and geology. Evolution is important for survival because only the fittest can survive to the last and weak one gets eliminated.