Question

In five kingdom classification, Euglena is placed in
A. Monera
B. Protista
C. Fungi
D. Animalia

Answer 1

Euglena is a single-celled microscopic algae that is worldwide in habitat. Euglena belongs to the class euglenoids. They are found in freshwater as well as in salt water.

Complete answer:
In five kingdom classification, Euglena is placed in Protista. The five kingdom system of classification was proposed by R.H.Whittaker in $1969.$The five kingdoms proposed by monera, Protista, fungi, plantae and Animalia.

(1) Monera: Monera include a group of unicellular prokaryotic organisms. The nuclear material is not enclosed in a nuclear membrane. so it is called prokaryotic. Example: Bacteria.
(2) Protista: Protista include eukaryotic organisms that have flagella in their structure. The cells of protest organisms are nucleated. Example: Euglena, algae, amoeba, etc.
(3) Fungi: These are eukaryotic organisms that lack chlorophyll. They play an important role in the environment as they decompose. The material and recycle it. The cell walls are made of chitin.
(4) Plantae: Plantae are multi- cellular eukaryotic organisms. The certain chloroplast in their structure and so can undergo the process of photosynthesis.
(5) Animalia: These are multi celled eukaryotic organisms that lack chloroplast and are so called heterotopic.
Euglena is placed in Protista under the 5 kingdom system. They have flagella in their structure. Euglena possess chloroplast and so they can prepare food material. These are partially autotrophic.

Therefore, from the above explanation the correct option is (B) Protista.

Note: Euglena lacks cell wall but in law moisture conditions and in scarcity of food, euglena forms a protective wall around itself and stays dormant or stays at the resting conditions until adverse environmental conditions improve.