ZOO201 MCQs

ZOO201 · Lecture 250 to 271 · MCQs · Efforts by Muhammad Ahmad Prince & Koh e · Noor

1. The digestive tract forms a U-shaped gut in the calyx.
2. There is no larval stage or metamorphosis in Chaetognaths.
3. Sea cucumbers can evert tubules of the respiratory tree, called Cuverian tubules.
4. A pheromone that the queen releases controls the honeybee caste system
5. The body of an insect is divided into three tagmata: head, thorax, and abdomen.
6. An insect growth regulator (IGR) is a substance (chemical) that inhibits the life cycle of an insect.
7. Grasshopper tympanal organs can detect sounds in the range of 1,000 to 50,000 cps.
8. The human ear can detect sounds between 20 and 20,000 cps.
9. Thermoregulation is a requirement for flying insects.
10. Arrow worms are active predators.
11. Arrow worms are active swimmers.
12. Most Chaetognaths are planktonic, 0.5 to 12 cm in length,
13. Entoprocts have a small body cavity that most zoologists consider a pseudocoelom.
14. Most entoprocts are microscopic.
15. Cycliophores can reproduce asexually by producing a larva stage, called the Pandora that is released and settles on the same host.
16. In Cycliophores Protonephridia are used in excretion.
17. The asexual feeding stage of symbion is about 0.3 mm tall.
18. The body wall contains gland cells that eventually secrete the chitinous tube.
19. The gonads are in the coelom.
20. A flap of tissue called the epistome covers the mouth.
21. The Phoronids consist of about a dozen marine species divided between two genera: Phoronis and Phoronopsis.
22. Statoblasts are asexually produced and accumulate in the metacoel.
23. A statoblast is a hard, resistant capsule containing a mass of germinative cells.
24. Some freshwater ectoprocts produce a dormant stage called a statoblast.
25. In others, simple gonads produce both sperm and eggs in the same autozooid.
26. Each colony can contain about 2 million zooids.
27. Most ectoprocts are monoecious.
28. Echinoids are dioecious.
29. Sea cucumbers are dioecious.
30. Ectoprocts grow by budding
31. All species are aquatic (both freshwater and marine) and less than 1.5 mm in length.
32. Brachiopods are commonly called lampshells because they resemble ancient Roman oil lamps.
33. An anus always open outside of the lophophore.
34. Metamorphosis occurs after larvae attach to the substrate.
35. The unattached end of a sea lily is called the crown.
36. Sea lilies attach permanently to their substrate by a stalk.
37. Members of the class Crinoidea include the sea lilies and the feather stars.
38. Sea cucumbers have no true brain.
39. Most sea cucumbers ingest particulate organic matter using their tentacles.
40. The class Holothuroidea has approximately 1,500 species, whose members are commonly called sea cucumbers.
41. A chewing apparatus, called Aristotle’s lantern, can be projected from the mouth.