Arthropoda, Mollusca and Echinodermata Practice Questions
20 free Arthropoda, Mollusca and Echinodermata practice questions for the Zoology, each with the correct answer and a detailed explanation. Open any question below, or take the full set as an interactive quiz.
Questions
20 questions
All Arthropoda, Mollusca and Echinodermata questions
- Q1. Which of the following structures is a unique characteristic of the Phylum Echinodermata used for locomotion and food handling?
- Q2. In Arthropods, the body cavity is greatly reduced and replaced by a blood-filled space known as the:
- Q3. Which specialized rasping organ is found in the mouth of most Molluscs, except Bivalves?
- Q4. Echinoderms exhibit a unique symmetry transition during their life cycle. Which of the following describes this correctly?
- Q5. The respiratory organs in terrestrial arthropods like insects, consisting of a network of air-filled tubes, are called:
- Q6. Which class of Mollusca is characterized by a closed circulatory system and high intelligence?
- Q7. The exoskeleton of Arthropods is primarily composed of which polysaccharide?
- Q8. What is the function of 'Aristotle's Lantern' in sea urchins?
- Q9. Which structure in Molluscs is responsible for secreting the calcareous shell?
- Q10. In the Phylum Arthropoda, the process of shedding the old exoskeleton is known as:
- Q11. Which of the following is a characteristic excretory organ found in many Crustaceans?
- Q12. Echinoderms possess a sieve-like plate that allows water to enter the water vascular system. This plate is called the:
- Q13. The fusion of segments into functional body regions, such as the cephalothorax in spiders, is known as:
- Q14. Which class of Mollusca undergoes 'torsion' during larval development, rotating the visceral mass 180 degrees?
- Q15. The pincer-like structures on the surface of some echinoderms that keep the body free of debris and parasites are:
- Q16. Which arthropod group is distinguished by having two pairs of antennae and biramous appendages?
- Q17. The 'Pearl' in oysters is formed by the deposition of nacreous layers around a foreign particle. Which part of the mollusc secretes these layers?
- Q18. What type of larva is common to many Molluscs and Annelids, suggesting an evolutionary link between the two phyla?
- Q19. Spiders and scorpions belong to the subphylum Chelicerata. Which of the following do they LACK?
- Q20. In Echinoderms, gas exchange often occurs through thin-walled protrusions of the coelom called: