Question

A researcher identified a unicellular eukaryotic organism as fungi. What identification key would you suggest according to the five kingdom classification to keep a unicellular organism in the Kingdom Fungi?

Answer 1

According to the five-kingdom classification, a unicellular eukaryotic organism can be placed in Kingdom Fungi if it has the following characteristics:

1. It has a well-defined nucleus and membrane-bound organelles.
2. It has a cell wall made of chitin.
3. It lacks chlorophyll and shows heterotrophic nutrition by absorption.
4. It reproduces by budding or spore formation.

Example: Yeast (Saccharomyces).

Thus, the presence of a chitinous cell wall, absorptive heterotrophic nutrition and fungal reproduction helps identify the organism as belonging to Kingdom Fungi.