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1.1 Animal Architecture — Test 1
Q1. A coelom formed from paired pouches that arise as lateral outpouchings of the embryonic archenteron is called:✓ Enterocoelic
Q2. Which one of the following is NOT correctly matched?✓ Metameric haemocoelomate animal — Mollusca
Q3. Mesenteries (peritoneal folds suspending the gut) are found in:✓ Triploblastic coelomate animals
Q4. The nematode body cavity is called a pseudocoel because it:✓ Is not lined by mesodermal peritoneum on all sides
Q5. In molluscs, the general body cavity is the:✓ Haemocoel
Q6. If the mouth develops from or near the blastopore, the animal is called a:✓ Protostome
Q7. In which minor phylum is the anus located inside the ring of tentacles (lophophore)?✓ Phoronida
Q8. Animals having both a true coelom and body segmentation belong to the phylum:✓ Annelida
Q9. Cnidarians show radial symmetry, which is an adaptation suited to:✓ A sessile or free-floating lifestyle
Q10. In deuterostomes, the blastopore develops into the:✓ Anus
Q11. Aschelminthes (e.g. roundworms) are:✓ Pseudocoelomates
Q12. The wheel animalcules, bearing a ciliated corona, belong to the group:✓ Rotifera
Q13. Which of these is a member of the phylum Entoprocta?✓ Loxosoma
Q14. Multicellular animals that lack a true tissue grade of organisation are called:✓ Parazoa
Q15. Which one of the following is a rotifer?✓ Philodina
Q16. Animals of the phylum Echinodermata are:✓ Enterocoelomates
1.1 Animal Architecture — Test 2
Q17. The type of coelom formed in a chick (a vertebrate) is:✓ Schizocoelom
Q18. The adult is radially symmetrical but the larva is bilaterally symmetrical in the phylum:✓ Echinodermata
Q19. In the phylum Entoprocta, the anus lies ____ the circlet of tentacles:✓ Inside
Q20. In bryozoans, each zooid is enclosed in a secreted non-living exoskeletal case called the:✓ Zooecium
Q21. Which of the following does NOT belong to the phylum Echiuroidea?✓ Bonellia is correct; the odd one is Loxosoma
Q22. Which one of the following is NOT true for the phylum Chordata?✓ Protostome organisation
Q23. Platyhelminthes are best described as:✓ Flatworms; triploblastic; acoelomate
Q24. Which one of the following is a deuterostome phylum?✓ Hemichordata
Q25. 'Wheel animalcules' is the common name for members of:✓ Rotifera
Q26. Which statement about germ-layer origins of tissues is NOT correct?✓ Red blood cells originate from endoderm
Q27. Which of the following is a diploblastic animal?✓ Jelly fish
Q28. Cnidarians are correctly described as:✓ Diploblastic animals with a medusa as one basic body form
Q29. The mesozoans are grouped under a single class named:✓ Dicyemida (Rhombozoa)
Q30. Schizocoely, with the mouth from the blastopore and spiral determinate cleavage, is characteristic of:✓ Protostomes
Q31. Select the INCORRECT statement about lower metazoans:✓ Placozoans are diploblasts with well-differentiated tissue layers
Q32. Which sequence shows a correct advancement in animal organisation?✓ Acoelomates → Protostomes → Eucoelomates → Deuterostomes
1.1 Animal Architecture — Test 3
Q33. Which is NOT a characteristic of a phoronid?✓ Closed blood vascular system is correct; the exception is 'open blood vascular'
Q34. Cardiac (heart) and cerebral (brain) tissues are derived, respectively, from the germ layers:✓ Mesoderm and ectoderm
Q35. A probable cause of the rapid diversification of animals during the Cambrian explosion was:✓ A rise in atmospheric oxygen supporting active metabolism
Q36. Radial symmetry is a characteristic feature of which phylum?✓ Cnidaria
Q37. Which animal has a bilaterally symmetrical larva but a radially symmetrical adult?✓ Star fish
Q38. An acoelomate animal is best represented by the:✓ Flatworm (Platyhelminthes)
Q39. Coelomates are correctly described as having:✓ A fluid-filled cavity fully lined by mesodermal peritoneum
Q40. Pseudocoelomate, acoelomate and coelomate body plans differ mainly in the:✓ Presence and lining of the body cavity
Q41. Animals lacking organs and tissues, with a cellular grade of organisation, are the:✓ Sponges (Porifera)
Q42. The presence of a notochord, a dorsal hollow nerve cord and pharyngeal slits defines the phylum:✓ Chordata
Q43. Triploblastic animals possess which three germ layers?✓ Ectoderm, mesoderm and endoderm
Q44. In a haemocoel (as in arthropods and molluscs), the body cavity is:✓ Filled with blood and is part of the open circulation
Q45. Bilateral symmetry is usually associated with:✓ An active lifestyle and the development of a head (cephalisation)
Q46. Metamerism (true segmentation) is best displayed by the phylum:✓ Annelida
Q47. The diploblastic body plan, with ectoderm and endoderm separated by mesoglea, is seen in:✓ Cnidarians and ctenophores
Q48. The body cavity that is a persistent blastocoel, not lined fully by mesoderm, is the:✓ Pseudocoel