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2.4 Platyhelminthes — Test 1
Q1. The correct sequence of larval stages in the life cycle of Fasciola (liver fluke) is:✓ Miracidium → sporocyst → redia → cercaria → metacercaria
Q2. In tapeworms (Cestoda), the separation of mature/gravid proglottids from the body is called:✓ Apolysis
Q3. The free-living, mostly aquatic class of Platyhelminthes is:✓ Turbellaria
Q4. Flame cells (protonephridia) in flatworms function in:✓ Excretion and osmoregulation
Q5. Platyhelminthes are characterised as:✓ Triploblastic, acoelomate, dorsoventrally flattened worms
Q6. The intermediate host in the life cycle of the liver fluke Fasciola is a:✓ Snail
Q7. The scolex of a tapeworm functions to:✓ Attach the worm to the host's gut wall
Q8. Tapeworms lack a digestive system because they:✓ Absorb predigested food directly through the body surface
Q9. Which flatworm has a biradially or bilaterally symmetrical body and is free-living?✓ Planaria
Q10. The sporocyst is a larval stage in the life cycle of the:✓ Liver fluke (Fasciola)
Q11. Pseudometameric (false) segmentation, where segments are reproductive units, is seen in:✓ Cestoda (tapeworms)
2.4 Platyhelminthes — Test 2
Q12. Acoelomate body organisation, where the space between gut and body wall is filled with parenchyma, is seen in:✓ Platyhelminthes
Q13. The disease schistosomiasis (bilharzia) is caused by a flatworm spread through:✓ Water containing infected snails
Q14. The most primitive nervous system among bilaterally symmetrical animals (with a simple brain and nerve cords) is found in:✓ Platyhelminthes
Q15. Tapeworms and flukes are highly specialised because they are:✓ Endoparasites with reduced sense organs and locomotion
Q16. Flatworms exchange gases by:✓ Diffusion across the flattened body surface
Q17. The intermediate host of the pork tapeworm Taenia solium is the:✓ Pig
Q18. The excretory system of flatworms is described as a protonephridial system because it uses:✓ Flame cells with tufts of beating cilia
Q19. Regeneration is especially well developed in which free-living flatworm?✓ Planaria
Q20. Flukes (Trematoda) typically attach to their host using:✓ Suckers
Q21. Hermaphroditism (both sexes in one individual) is common in flatworms because it:✓ Improves the chance of reproduction in a parasitic life