PG TRB ZOOLOGY | Unit I - ANIMAL DIVERSITY AND PHYLOGENY | Levels of structural organization – Unicellular, colonial and multicellular forms.

PG TRB ZOOLOGY ONLINE TEST / QUIZ AS PER LATEST SYLLABUS | Unit I - ANIMAL DIVERSITY AND PHYLOGENY | Levels of structural organization – Unicellular, colonial and multicellular forms.

1. Which of the following is unicellular?

Volvox Paramecium Hydra Sponges

2. Colonial organization is exhibited by:

Euglena Amoeba Volvox Paramecium

3. Which is an example of a multicellular animal?

Plasmodium Hydra Amoeba Euglena

4. The correct sequence of evolution is:

Colonial → Multicellular → Unicellular Unicellular → Colonial → Multicellular Multicellular → Unicellular → Colonial Multicellular → Colonial → Unicellular

5. Unicellular organisms perform all life activities by:

Tissues Cells Organs None of these

6. The Volvox colony consists of:

Many unicellular organisms A single multicellular organism Only two cells None of these

7. Cellular level of organization is primarily seen in:

Cnidaria Porifera Platyhelminthes Annelida

8. What is the main advantage of multicellularity?

Increase surface area Cell specialisation Single reproduction Absence of nucleus

9. Organisms showing tissue-level organization belong to:

Porifera Cnidaria Protozoa Platyhelminthes

10. Which of the following has a colonial form?

Plasmodium Euglena Volvox Hydra

11. The term 'colony' in protozoa refers to:

Group of multicellular animals Many unicellular organisms living together A single large eukaryotic cell Mobile gametes

12. Sponges have which level of organization?

Unicellular Tissue Cellular Organ

13. In which group do all members exhibit multicellularity?

Protozoa Porifera Volvox Amoeba

14. Colonial organization is best described as:

Specialized tissues performing functions Many unicellular organisms living in a group but functioning independently A single cell with many nuclei Multiple organs in an organism

15. The first multicellular animals are thought to have evolved from:

Colonial flagellates Amoebae Ciliates Sporozoans

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