Question

Which of the following is not a unicellular organism?

• A. Amoeba
• B. Yak
• C. Yeast
• D. Rhizobium

Answer 1

The correct option is B

Yak

The correct option is (B):

Explanation of the correct option:

1. Yak is included in Kingdom Animalia.
2. Animals included in kingdom Animalia are multicellular, eukaryotic and heterotrophic in nature.
3. Hence yak is a multicellular organism.

Explanation of the incorrect options:

Option (A):
Amoeba is included in kingdom Protista and it is unicellular and eukaryotic.
Option (C):
Yeast is a fungus that is mostly unicellular and lives in a colony.
Option (D):
Rhizobium is a bacteria that live in the root nodule of leguminous plants and it is unicellular in nature.
Final answer: Yak is a multicellular organism.