Animal Diversity — 2025 Past Questions

Lagos State University ZOO102: 130 questions.

Topics: Diversity of animal forms, structures, and functions, General classification of the animal kingdom, Multicellularity and embryonic layer development, History of animal diversity, General classification of the annelids, Animal systematics

1. Elephantiasis in man is caused by?
   1. Dracunculus medinensis (guinea worm)
   2. Ancylostoma duodenale (hookworm)
   3. Enterobius vermicularis (pinworm)
   4. Wuchereria bancrofti (filarial worm)
2. A scientist notable for genetics is
   1. C. Darwin
   2. G. Cuvier
   3. G. Mendel
   4. J. Goodall
3. The first phylum with a body segmentation system is
   1. Porifera
   2. Cnidaria
   3. Rotifera
   4. Annelida
4. A protozoan parasite of chicken (birds) is?
   1. Stentor
   2. Isospora
   3. Toxoplasma
   4. Eimeria
5. The eye worm of man is?
   1. Optical loa
   2. Loa loa
   3. Onchocerca volvulus
   4. Trichuris trichiura
6. Which of the following are the three main classes of the phylum Annelida?
   1. Polychaeta, Oligochaeta and Hirudinea
   2. Polychaeta, Hirudinea and Cephalopoda
   3. Oligochaeta, Turbellaria and Hirudinea
   4. Polychaeta, Oligochaeta and Trematoda
7. Another name for Ctenophora is?
   1. Jellyfish
   2. Cnidarians
   3. Sponges
   4. Comb jellies
8. Among cnidarians, the medusoid form is absent in members of the class?
   1. Anthozoa
   2. Scyphozoa
   3. Hydrozoa
   4. All of the above
9. The anticoagulant secreted by Hirudo during feeding to prevent clotting is?
   1. Hirudon
   2. Heparin
   3. Haematin
   4. Hirudin
10. Planarians, liver fluke and Taenia are all:
    1. Segmented
    2. Found in the gut
    3. Coelomates
    4. Flatworms
11. The study of marine mammals is?
    1. Malacology
    2. Cetology
    3. Marinology
    4. Hydro mammalogy
12. Nematocysts are special cells found in?
    1. Cnidarians
    2. Annelids
    3. Rotifers
    4. Molluscs
13. A pig acquires infection of Taenia solium by ingestion of?
    1. Cysticercus larva
    2. Eggs containing oncospheres (hexacanth embryos)
    3. Adult tapeworm
    4. Cercaria larva
14. The body cavity found in Ascaris is
    1. Enterocoel
    2. Pseudocoel
    3. Haemocoel
    4. Coelenteron
15. A ciliophoran with cilia around the peristome is
    1. Peritrichia
    2. Holotrichia
    3. Suctoria
    4. Spirotrichia
16. Phylum Rotifera is divided into the following classes EXCEPT
    1. Monogononta
    2. Bdelloidea
    3. Philodina
    4. Seisonidea
17. Most echinoderms have ______ number of arms.
    1. Five
    2. Three
    3. Four
    4. Eight
18. Tunic is absent in ____
    1. Thaliacea
    2. Ascidiacea
    3. Appendicularia
    4. Pleurobrachia
19. Molluscs have the following EXCEPT ____
    1. Mantle
    2. Arms
    3. Visceral mass
    4. Foot
20. Which is NOT a characteristic of mammals?
    1. 3 pairs of cranial nerves
    2. Internal fertilization
    3. Metanephric kidney
    4. Movable eyelids
21. Class Demospongiae includes the ____
    1. Glass sponges
    2. Ribbon sponges
    3. Fish net sponges
    4. Bath sponges
22. Starfishes are ____
    1. Omnivorous
    2. Vegetarians
    3. Carnivorous
    4. Ichthyophagous
23. The tusks of an elephant are
    1. Elongated canines
    2. Elongated molars
    3. Elongated incisors
    4. Elongated premolars
24. The symmetry of ctenophores is _____
    1. Biradial
    2. Bilateral
    3. Asymmetrical
    4. None of the above
25. The name Arthropoda was established by _____ in _____
    1. Siebold, 1946
    2. Landmark, 1846
    3. Von Siebold, 1845
    4. Aristotle, 1955
26. Rotifers are pseudocoelomates. They have ciliated crowns called?
    1. Euplectella
    2. Corona
    3. Pellicle
    4. Cilia-like flagella
27. Proglottids are found in the body structure of ____ species.
    1. Fasciola
    2. Taenia
    3. Schistosoma
    4. Dugesia
28. Wuchereria was first discovered by:
    1. Huxley
    2. Otto Wucherer
    3. Charles Darwin
    4. Louis Pasteur
29. The number of living species of human is
    1. One
    2. Seven
    3. Nine
    4. Seventeen
30. The study of birds is _____
    1. Ornithology
    2. Entomology
    3. Apology
    4. Endocrinology
31. Which of the following is a characteristic feature of arthropods?
    1. Radial symmetry
    2. Jointed appendages
    3. Closed circulatory system
    4. Absence of segmentation
32. The exoskeleton of arthropods is made up of:
    1. Cellulose
    2. Chitin
    3. Collagen
    4. Keratin
33. The main respiratory organs of terrestrial insects are:
    1. Lungs
    2. Gills
    3. Tracheae
    4. Nephridia
34. Most crustaceans are found in:
    1. Aquatic habitats, mainly marine
    2. Deserts
    3. Underground soil only
    4. The air
35. Which class of arthropods includes spiders and scorpions?
    1. Insecta
    2. Arachnida
    3. Myriapoda
    4. Crustacea
36. Platyhelminthes are commonly known as:
    1. Roundworms
    2. Flatworms
    3. Segmented worms
    4. Ribbon worms
37. The digestive system of platyhelminthes is:
    1. Complete with mouth and anus
    2. Absent
    3. Incomplete, with a single opening
    4. Well-developed and complete
38. Which of the following is a free-living platyhelminth?
    1. Tapeworm
    2. Planaria
    3. Liver fluke
    4. Hookworm
39. Platyhelminthes have a body cavity known as:
    1. Coelom
    2. Pseudocoelom
    3. Acoelom
    4. Haemocoel
40. The nervous system of platyhelminthes is:
    1. Absent
    2. Ladder-like
    3. Highly complex
    4. Circular
41. Protozoa are classified under which kingdom?
    1. Animalia
    2. Plantae
    3. Protista
    4. Fungi
42. Which of the following is a characteristic of protozoans?
    1. Multicellular
    2. Prokaryotic
    3. Unicellular
    4. Autotrophic
43. Movement in amoebae is carried out by:
    1. Cilia
    2. Flagella
    3. Pseudopodia
    4. Fins
44. Malaria is caused by a protozoan belonging to the genus:
    1. Paramecium
    2. Plasmodium
    3. Trypanosoma
    4. Amoeba
45. Which protozoan is responsible for African sleeping sickness?
    1. Giardia
    2. Entamoeba
    3. Trypanosoma
    4. Leishmania
46. Sponges belong to the phylum:
    1. Cnidaria
    2. Platyhelminthes
    3. Porifera
    4. Mollusca
47. The body of a sponge is supported by:
    1. Bones
    2. Spicules
    3. Muscles
    4. Cartilage
48. Water enters the sponge's body through small openings called:
    1. Oscula
    2. Ostia
    3. Spongocoel
    4. Gemmules
49. Sponges obtain their food by:
    1. Predation
    2. Filter feeding
    3. Photosynthesis
    4. Parasitism
50. Sponges reproduce asexually by:
    1. Budding
    2. Fragmentation
    3. Regeneration
    4. All of the above
51. Nematodes are commonly known as:
    1. Flatworms
    2. Roundworms
    3. Annelids
    4. Segmented worms
52. The body cavity of nematodes is called:
    1. Coelom
    2. Pseudocoelom
    3. Acoelom
    4. Haemocoel
53. Nematodes have which type of digestive system?
    1. Incomplete
    2. Absent
    3. Complete
    4. Fragmented
54. The disease caused by the nematode Wuchereria bancrofti is:
    1. Malaria
    2. Filariasis
    3. Schistosomiasis
    4. Ascariasis
55. Nematodes exhibit which type of symmetry?
    1. Radial
    2. Bilateral
    3. Asymmetrical
    4. Spiral
56. Annelids are characterized by:
    1. Unsegmented bodies
    2. Segmented bodies
    3. Radial symmetry
    4. No body cavity
57. The excretory system in annelids is composed of:
    1. Nephridia
    2. Malpighian tubules
    3. Kidneys
    4. Flame cells
58. Which of the following is an example of a marine annelid?
    1. Earthworm
    2. Leech
    3. Nereis
    4. Tapeworm
59. Marine polychaete annelids move mainly by using:
    1. Flagella
    2. Cilia
    3. Parapodia
    4. Tentacles
60. Which of the following is an example of a freshwater annelid?
    1. Earthworm
    2. Leech
    3. Nereis
    4. None of the above
61. Molluscs are characterized by:
    1. A segmented body
    2. A hard exoskeleton
    3. A soft body, usually with a shell
    4. Radial symmetry
62. The radula is absent in which group of molluscs?
    1. Gastropods
    2. Bivalves
    3. Cephalopods
    4. Polyplacophora
63. Which of the following molluscs lacks an external shell?
    1. Snail
    2. Octopus
    3. Clam
    4. Oyster
64. Cephalopods are known for their:
    1. Filter-feeding habits
    2. Complex nervous system
    3. Sessile lifestyle
    4. Hermaphroditism
65. The molluscan class Bivalvia includes:
    1. Snails and slugs
    2. Squid and octopus
    3. Clams and oysters
    4. None of the above
66. Echinoderms are characterized by:
    1. Bilateral symmetry in adults
    2. Radial symmetry in adults
    3. Radial symmetry in larvae
    4. Bilateral symmetry in larvae and adults
67. The water vascular system in echinoderms is used for:
    1. Respiration only
    2. Reproduction
    3. Locomotion and feeding
    4. Excretion
68. Which of the following is an example of an echinoderm?
    1. Sea urchin
    2. Coral
    3. Jellyfish
    4. Sponge
69. Echinoderms have:
    1. An exoskeleton
    2. An endoskeleton
    3. No skeleton
    4. A cartilaginous skeleton
70. The class Asteroidea includes:
    1. Sea urchins
    2. Sea cucumbers
    3. Starfish
    4. Brittle stars
71. Protochordates are characterized by the presence of:
    1. A notochord
    2. A vertebral column
    3. Jointed appendages
    4. A hard exoskeleton
72. Which of the following is a protochordate?
    1. Amphioxus
    2. Frog
    3. Snake
    4. Fish
73. Which of the following is a subphylum of the protochordates?
    1. Vertebrata
    2. Cephalochordata
    3. Hemichordata
    4. Echinodermata
74. The notochord in protochordates serves as:
    1. A digestive organ
    2. A supportive structure
    3. A respiratory organ
    4. A sensory organ
75. Urochordates are also known as:
    1. Tunicates
    2. Lancelets
    3. Sea urchins
    4. Lampreys
76. Which of the following is a characteristic feature of cephalochordates?
    1. Presence of a vertebral column
    2. Absence of a notochord
    3. Notochord extending into the head
    4. Notochord present only in the larval stage
77. In which stage do urochordates exhibit a notochord?
    1. Adult stage
    2. Larval stage
    3. Both stages
    4. Neither stage
78. Hemichordates are closely related to:
    1. Echinoderms
    2. Molluscs
    3. Arthropods
    4. Annelids
79. Which of the following is a defining feature of protochordates?
    1. Jointed appendages
    2. Presence of a dorsal hollow nerve cord
    3. Bilateral symmetry in larvae only
    4. Segmented body
80. Amphioxus is a well-known example of:
    1. Urochordata
    2. Cephalochordata
    3. Hemichordata
    4. Vertebrata
81. Which class of echinoderms includes sea cucumbers?
    1. Asteroidea
    2. Echinoidea
    3. Holothuroidea
    4. Ophiuroidea
82. The echinoderm water vascular system ends in structures called:
    1. Tube feet
    2. Cilia
    3. Flagella
    4. Tentacles
83. Which of the following echinoderms is capable of evisceration as a defense mechanism?
    1. Sea urchin
    2. Starfish
    3. Brittle star
    4. Sea cucumber
84. The process of regeneration in echinoderms is best exemplified by:
    1. Starfish
    2. Sea urchin
    3. Sand dollar
    4. Sea lily
85. Which of the following is NOT an echinoderm?
    1. Starfish
    2. Sea urchin
    3. Coral
    4. Brittle star
86. The larvae of echinoderms exhibit which type of symmetry?
    1. Bilateral symmetry
    2. Radial symmetry
    3. Asymmetry
    4. Spiral symmetry
87. The class Crinoidea includes:
    1. Sea stars
    2. Brittle stars
    3. Sea lilies and feather stars
    4. Sea cucumbers
88. Echinoderms have which type of circulatory system?
    1. Open (reduced haemal) circulatory system
    2. Closed circulatory system
    3. No circulatory system at all
    4. A heart with four chambers
89. Which echinoderm is often referred to as a 'living fossil'?
    1. Starfish
    2. Sea urchin
    3. Sea lily
    4. Brittle star
90. The class Ophiuroidea includes:
    1. Sea cucumbers
    2. Brittle stars and basket stars
    3. Sea urchins and sand dollars
    4. Sea stars
91. Earthworms belong to which class of Annelida?
    1. Polychaeta
    2. Oligochaeta
    3. Hirudinea
    4. Cephalopoda
92. The clitellum in earthworms is involved in:
    1. Locomotion
    2. Reproduction
    3. Digestion
    4. Respiration
93. Which annelid is known for its blood-sucking habits?
    1. Earthworm
    2. Leech
    3. Nereis
    4. Tubifex
94. The setae in annelids are used for:
    1. Feeding
    2. Respiration
    3. Locomotion
    4. Sensation
95. The nervous system of annelids consists of:
    1. A dorsal brain (cerebral ganglia) and a double ventral nerve cord
    2. A nerve net only
    3. No nerve cells
    4. A dorsal hollow nerve cord
96. Which nematode is known for causing trichinosis in humans?
    1. Ascaris lumbricoides
    2. Trichinella spiralis
    3. Enterobius vermicularis
    4. Wuchereria bancrofti
97. The disease caused by the nematode Ascaris lumbricoides is:
    1. Filariasis
    2. Ascariasis
    3. Schistosomiasis
    4. Trichinosis
98. Nematodes have a complete digestive system that includes:
    1. Mouth and anus
    2. Mouth only
    3. Anus only
    4. None of the above
99. Nematodes exhibit which type of movement?
    1. Ciliary movement
    2. Flagellar movement
    3. Undulating (whip-like) movement
    4. Parapodial movement
100. Which of the following is a parasite of the human intestine?
     1. Ascaris
     2. Anopheles
     3. Hydra
     4. Nereis

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