PG TRB ZOOLOGY ONLINE TEST / QUIZ AS PER LATEST SYLLABUS | Unit I - ANIMAL DIVERSITY AND PHYLOGENY | Structure, affinities and life history of Minor Phyla – Phoronida.

PG TRB ZOOLOGY ONLINE TEST / QUIZ AS PER LATEST SYLLABUS | Unit I - ANIMAL DIVERSITY AND PHYLOGENY | Structure, affinities and life history of Minor Phyla – Phoronida.

1. The characteristic larva of Phoronida is known as: a) Trochophore b) Actinotroch c) Bipinnaria d) Tornaria

2. The lophophore in Phoronida is primarily used for: a) Locomotion and defense b) Reproduction and excretion c) Feeding and respiration d) Sensory perception and support

3. Phoronids are sedentary marine organisms that live in: a) Calcareous tubes b) Siliceous spicules c) Chitinous tubes d) Gelatinous masses

4. Which of the following is an excretory organ found in Phoronida? a) Protonephridia b) Malpighian tubules c) Green glands d) Metanephridia

5. The coelom of Phoronida is divided into how many parts? a) Two (bipartite) b) Three (tripartite) c) Four (quadripartite) d) Single (unipartite)

6. The nervous system of Phoronida consists of: a) A ventral nerve cord b) A dorsal nerve cord c) A circumpharyngeal nerve ring d) A single cerebral ganglion

7. The blood vascular system in Phoronida is: a) Open type b) Closed type c) Absent d) Partially open

8. What is the process of metamorphosis in the Actinotroch larva? a) It involves a gradual change into the adult form. b) It is a slow process of tissue reorganization. c) It is a sudden and catastrophic transformation. d) It involves a period of dormancy.

9. Phoronida show affinities with which of the following phyla based on their tripartite coelom? a) Annelida b) Mollusca c) Brachiopoda and Bryozoa d) Arthropoda

10. Phoronids belong to the group Lophophorata, which is characterized by the presence of a: a) Notochord b) Lophophore c) Radula d) Mantle cavity

11. The Actinotroch larva possesses a hood or an umbrella-like structure called a: a) Telson b) Epistome c) Telotroch d) Episphere

12. The genus Phoronis is known to reproduce asexually by: a) Budding b) Fragmentation c) Transverse fission d) Spore formation

13. The Phoronid body is divided into: a) Head, Thorax, Abdomen b) Prosoma, Mesosoma, Metasoma c) Prostomium, Peristomium, Pygidium d) Lophophore and Trunk

14. Which statement about the Actinotroch larva's gut is correct? a) It is a straight tube b) It is U-shaped c) It is V-shaped d) It is highly coiled

15. The circulatory fluid in Phoronida contains: a) Hemocyanin b) Hemoglobin c) Chlorocruorin d) Both Hemocyanin and Hemoglobin

16. The Actinotroch larva is a free-swimming, planktonic organism, while the adult is: a) Free-swimming b) Sedentary c) Parasitic d) Commensal

17. Which phylum shares a similar lophophore structure with Phoronida? a) Echinodermata b) Chordata c) Annelida d) Bryozoa

18. The larval metamorphosis of Phoronida is characterized by the eversion of the: a) Telotroch b) Metasomal sac c) Mesosomal sac d) Protosomal sac

19. In Phoronida, the gut is: a) Incomplete, with a single opening b) U-shaped, with the mouth and anus close to each other c) Straight, extending from mouth to anus d) Absent in adults

20. Phoronids are considered a minor phylum because: a) They have a very small body size. b) They have a very limited number of species. c) They are extinct. d) They lack a true coelom.

21. The Phoronid nervous system lacks a brain but has a: a) Medullary cord b) Nerve net c) A cerebral ganglion d) Dorsal nerve cord

22. The lophophoral tentacles of Phoronida are: a) Solid and ciliated b) Hollow and ciliated c) Solid and non-ciliated d) Hollow and non-ciliated

23. In Phoronida, the blood is colorless, but the corpuscles contain: a) Hemoglobin b) Hemocyanin c) Chlorocruorin d) Myoglobin

24. The Actinotroch larva exhibits a crown of cilia at the anterior end, known as the: a) Telotroch b) Protonephridium c) Prototroch d) Epistome

25. Phoronida and Brachiopoda share a common ancestral lineage based on the presence of: a) Similar larval forms b) A notochord c) A lophophore d) A complete metamorphosis

26. The unique type of asexual reproduction in Phoronida that involves budding is called: a) Paratomy b) Schizogony c) Budding d) Transverse fission

27. Which of these is a typical habitat for Phoronids? a) Freshwater lakes b) Terrestrial soil c) Marine benthic zone d) Brackish water estuaries

28. The U-shaped gut of Phoronida allows for the mouth and anus to be: a) Located at opposite ends of the body b) Completely separate from each other c) Located near the lophophore d) Located on the ventral side of the body

29. The main body cavity of Phoronida is the coelom, which is formed by: a) Gastrulation b) Enterocoely c) Pseudocoely d) Acoelomatic development

30. Phoronids are considered to be related to which of the following based on their lophophore and tube-dwelling lifestyle? a) Annelida b) Bryozoa c) Arthropoda d) Mollusca

Share: