PG TRB ZOOLOGY | Unit I - ANIMAL DIVERSITY AND PHYLOGENY | Structure, affinities and life history of Minor Phyla – Ctenophora

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

1. Which of the following is a characteristic feature of Ctenophora?

• A) Cnidoblasts
• B) Colloblasts
• C) Nematocysts
• D) Spicules

2. The sense organ in Ctenophora is the:

• A) Statocyst
• B) Ocellus
• C) Tentaculocyst
• D) Auricle

3. Ctenophores exhibit which type of symmetry?

• A) Radial symmetry
• B) Biradial symmetry
• C) Bilateral symmetry
• D) Asymmetry

4. The comb plates in Ctenophora are made up of:

• A) Spicules
• B) Fused cilia
• C) Microvilli
• D) Flagella

5. Which term is used to describe the light-producing ability of Ctenophores?

• A) Bioluminescence
• B) Phosphorescence
• C) Chemiluminescence
• D) Fluoresence

6. The digestive system of Ctenophora is:

• A) Absent
• B) Incomplete
• C) Complete
• D) Extracellular

7. The cleavage pattern in Ctenophora is:

• A) Holoblastic equal
• B) Holoblastic unequal
• C) Meroblastic
• D) Radial

8. The larval stage of Ctenophora is known as:

• A) Planula
• B) Trochophore
• C) Cydippid
• D) Bipinnaria

9. Which of the following is a common example of Ctenophora?

• A) Aurelia
• B) Pleurobrachia
• C) Hydra
• D) Fasciola

10. The phylum Ctenophora is closely related to:

• A) Annelida
• B) Echinodermata
• C) Cnidaria
• D) Mollusca

11. Asexual reproduction in Ctenophora is generally:

• A) Common
• B) Rare
• C) Absent
• D) By budding

12. Which class of Ctenophora lacks tentacles?

• A) Tentaculata
• B) Nuda
• C) Cydippida
• D) Lobata

13. The eight rows of ciliated plates are called:

• A) Comb jellies
• B) Comb rows
• C) Locomotor plates
• D) Ctenes

14. What is the feeding mechanism of Ctenophora?

• A) Filter feeding
• B) Predation
• C) Parasitism
• D) Symbiosis

15. The nervous system of Ctenophora is:

• A) A nerve net
• B) A central nervous system
• C) Ladder-like
• D) Absent

16. The characteristic feature that gives Ctenophores their name is:

• A) Presence of colloblasts
• B) Presence of comb plates
• C) Bioluminescence
• D) Biradial symmetry

17. Which of the following is true about Ctenophores?

• A) Exclusively freshwater
• B) Mostly terrestrial
• C) Exclusively marine
• D) Found in both fresh and marine water

18. The development of Ctenophora is generally:

• A) Direct
• B) Indirect
• C) Mixed
• D) Parthenogenetic

19. Which of the following statements is INCORRECT about Ctenophora?

• A) They are diploblastic
• B) They are acoelomate
• C) They have a complete digestive tract
• D) They have a true coelom

20. Ctenophores are hermaphroditic, meaning they have:

• A) Separate sexes
• B) Both male and female gonads in the same individual
• C) Asexual reproduction only
• D) No gonads

21. The phylum Ctenophora is also known as:

• A) Sea anemones
• B) Flatworms
• C) Comb jellies
• D) Jellyfish

22. Ctenophores move with the help of:

• A) Podia
• B) Pseudopodia
• C) Ctenes
• D) Setae

23. The body plan of Ctenophora is generally described as:

• A) Diploblastic
• B) Triploblastic
• C) Diploblastic with a well-developed mesoglea
• D) Acoelomate

24. The sticky cells used for prey capture in Ctenophora are:

• A) Nematocysts
• B) Cnidocytes
• C) Colloblasts
• D) Choanocytes

25. The phylum Ctenophora is often classified as a sister group to:

• A) Porifera
• B) Platyhelminthes
• C) Cnidaria
• D) Mollusca

26. Which structure is responsible for the balance and orientation of Ctenophores?

• A) Tentacles
• B) Statocyst
• C) Comb plates
• D) Pharynx

27. Ctenophores are exclusively carnivorous and feed on:

• A) Plants
• B) Other Ctenophores, crustaceans, and plankton
• C) Dead organic matter
• D) Algae

28. The anal pores of Ctenophora are located at the:

• A) Oral end
• B) Aboral end
• C) Lateral sides
• D) Ventral side

29. The life history of Ctenophora typically involves:

• A) Metagenesis
• B) Asexual budding
• C) Direct development from a larva
• D) Alternation of generations

30. The body of a Ctenophore is made of a gelatinous substance called:

• A) Mesohyl
• B) Mesogloea
• C) Mesoderm
• D) Pseudocoelom

Final Score: / 30

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