BIO 1500 EXAM III ALL

1. Which of the following features is unique to animals?
   A Cells organized into tissues
   B Cell walls
   C Embryonic development
   D Heterotrophism
   E Movement associated with muscle tissue and nervous tissue

E

2. What is the most likely habitat for the origin of animals?
   A Rain forests
   B Freshwater habitats
   C Deserts
   D Oceans
   E Temperate grasslands

D

3. In a snake the head is _____ and the back is _____.
   A Icky; smooth
   B Anterior; ventral
   C Posterior; dorsal
   D Anterior; dorsal
   E Posterior; ventral

D

4. Anterior cephalization is a consequence of:
   A Coeloms
   B Radial symmetry
   C Segmentation
   D Bilateral symmetry
   E TikTok

D

5. Why was the evolution of tissues important?
   A Increased diffusion
   B Reduced efficiency
   C Prevented symmetry
   D Allowed specialized organs and organ systems

D

6. The musculoskeletal system develops from which germ layer?
   A Inner; ectoderm
   B Inner; endoderm
   C Middle; mesoderm
   D Outer; ectoderm
   E Outer; endoderm

C

7. A pseudocoelomate:
   A Has no body cavity
   B Has a cavity between mesoderm and endoderm
   C Has cavity fully in mesoderm
   D Has cavity between ectoderm and mesoderm

B

8. Which is correct about protostomes vs deuterostomes?
   A Protostomes: anus first
   B Protostomes: mouth first; Deuterostomes: anus first
   C Protostomes: both develop from blastopore
   D Deuterostomes: mouth first

B

9. Which phylum includes marine deuterostomes with radial symmetry?
   A Porifera
   B Echinodermata
   C Cnidaria
   D Chordata
   E Two are correct

B

10. Characteristic of lophotrochozoans:
    A Molting
    B Movement by cilia
    C Spiral cleavage
    D Tattoos
    E Vertebrae

C

11. Mammalia is a:
    A Kingdom
    B Genus
    C Order
    D Class
    E Phylum

D

12. Trochophore larva + protostome development indicates:
    A Parazoan
    B Ecdysozoan
    C Protostome
    D Pseudocoelomate
    E Unknown

C

13. Embryos that split into twins are:
    A Deuterostomes
    B Protostomes
    C Fish
    D Cnidarians
    E Echinoderms

A

14. Inner sponge layer consists of:
    A Amoeboid cells
    B Mesohyl
    C Choanocytes
    D Epithelium

C

15. Sponge water flow functions include:
    A Oxygen only
    B Food only
    C Waste only
    D Oxygen, Food, Waste, and Reproduction

D

16. Advantage of free-swimming larvae:
    A Camouflage
    B Colonize new areas
    C Vacation
    D Protect parents
    E Asexual reproduction

B

17. Sponge cells can reassemble:
    A True
    B False

A

18. Colloblasts function:
    A Defense
    B Digestion
    C Capture prey
    D Movement

C

19. Ctenophores move via:
    A Flagella
    B Bell muscles
    C Tentacles
    D Cilia

D

20. Sexual reproduction in cnidarians occurs in:
    A Polyp
    B Medusa
    C Planula
    D Both equally

B

21. If nematocysts fail:
    A Eggs released
    B Food capture stops
    C No water flow
    D No movement

B

22. Cubozoa are known for:
    A Regeneration
    B Deadly venom
    C Bioluminescence
    D Symbiosis

B

23. CO₂ increase causes:
    A Increased pH
    B Decreased pH and reduced calcium carbonate
    C Increased carbonate
    D No effect

B

24. Scyphozoans are:
    A Sea anemones
    B Comb jellies
    C Jellyfish
    D Coral
    E Box jellyfish

C

25. NOT found in both nematodes and flatworms:
    A Complete gut
    B Body wall gas exchange
    C Musculature
    D Tissues

A

26. Liver fluke encysts in:
    A Human muscle
    B Fish muscle
    C Snail
    D Water

B

27. Tapeworm digestion:
    A True
    B False

A

28. Most important invention preventing nematodes:
    A Vaccines
    B Toilets
    C Refrigerators
    D Siri
    E Stoves

B

29. Severity of nematode infection correlates with number:
    A True
    B False

A

30. Which is NOT a characteristic of animals?
    A Heterotrophy
    B Multicellularity
    C Cell walls
    D Movement

C

31. Advantage of bilateral symmetry:
    A Reproduction
    B Directional movement
    C Diffusion
    D Resistance

B

32. Nervous system comes from:
    A Endoderm
    B Mesoderm
    C Ectoderm
    D None

C

33. Group lacking true tissues:
    A Cnidarians
    B Sponges
    C Mollusks
    D Arthropods

B

34. Blastopore in protostomes becomes:
    A Mouth
    B Anus
    C Brain
    D Coelom

A

35. Molting occurs in:
    A Mollusks
    B Arthropods
    C Annelids
    D Echinoderms

B

36. Lophotrochozoa include:
    A Arthropods and nematodes
    B Mollusks and annelids
    C Echinoderms and chordates
    D Sponges and cnidarians

B

37. Function of choanocytes:
    A Protection
    B Support
    C Water currents for feeding
    D Digestion

C

38. True about cnidarians:
    A Complete digestive system
    B Nematocysts
    C Circulatory system
    D Freshwater only

B

39. Cubozoa have:
    A Eyes and strong venom
    B No symmetry
    C No nerves
    D Simple structure

A

40. Coral bleaching results from:
    A Growth
    B Stress expelling symbionts
    C Reproduction
    D Predation

B

41. Tapeworms differ because:
    A Flame cells
    B Pharynx
    C No digestive system
    D External digestion

C

42. Flame cells function:
    A Respiration
    B Excretion and water balance
    C Feeding
    D Movement

B

43. Schistosoma avoids immune system by:
    A Thick cuticle
    B Stylets
    C Flame cells
    D Coating in host antigens

D

44. Loss of bilateral symmetry causes:
    A Cephalization
    B Reduced movement
    C Segmentation
    D Coelom

B

45. Mesoderm gives rise to:
    A Nervous system
    B Digestive lining
    C Blood vessels
    D Epidermis

C

46. Animal with 3 layers but no cavity:
    A Diploblastic
    B Pseudocoelomate
    C Coelomate
    D Acoelomate

D

47. Ecdysozoa defined by:
    A Spiral cleavage
    B Trochophore larvae
    C Molting
    D Radial symmetry

C

48. Segmentation evolved:
    A Once
    B Multiple times independently
    C Only in protostomes
    D Only in deuterostomes

B

49. Correct germ layer pairing:
    A Ectoderm → gut
    B Mesoderm → nerves
    C Endoderm → digestive organs
    D Mesoderm → skin

C

50. Scolex is:
    A Mouth
    B Neck
    C Segments
    D Attachment organ

D

51. Which of the following is FALSE about Platyhelminthes?
    A Always parasitic
    B Acoelomates
    C Have muscles
    D Have a blind gut

A

52. The two major groups of Platyhelminthes include:
    A Trematoda and Neodermata
    B Cestoda and Trematoda
    C Neodermata and Turbellaria
    D Turbellaria and Cestoda

D

53. In the Chinese liver fluke life cycle which is NOT a host?
    A Fish
    B Birds
    C Humans
    D Snails

B

54. The scolex of a tapeworm is:
    A The mouth
    B The neck
    C The body segments
    D The attachment organ
    E Two of the above

D

55. Which of the following is FALSE about blood flukes?
    A Destroy white blood cells to hide
    B Cause schistosomiasis
    C Damage intestines and bladder
    D Can cause itching initially

A

56. Which is NOT a transmission route of parasites studied?
    A Fecal ingestion
    B Eating infected fish
    C Ingestion of infected blood
    D Skin penetration

C

57. Flame cells:
    A Support respiration
    B Use microvilli to move waste
    C Function in excretion and water balance
    D Located in tubules

C

58. Not all nematodes are:
    A Eutelic
    B Pseudocoelomates
    C Ecdysozoans

A

59. Worm infections are most common in:
    A Daycares
    B Countries lacking sanitation
    C Rural developed areas
    D Dense cities

B

60. Which organism lacks a digestive system?
    A Tapeworms
    B Flatworms
    C Hookworms
    D Roundworms

A

61. Filariasis affects the:
    A Circulatory system
    B Digestive system
    C Respiratory system
    D Lymphatic system
    E Two of the above

D

62. Which is NOT a reason worm infections persist?
    A Complex life cycles
    B High egg production
    C Often asymptomatic
    D Limited host range

D

63. Which is FALSE about tapeworm proglottids?
    A Repetitive units
    B Posterior produce eggs
    C Hermaphroditic
    D Growth zone posterior

D

64. Best prevention of nematode infection:
    A Plumbing and sanitation
    B Germ theory
    C Medication
    D Public campaigns

A

65. All animals share:
    A Autotrophy
    B Heterotrophy
    C Chemosynthesis
    D Photosynthesis

B

66. Animal cells are defined by:
    A Chloroplasts
    B Cell wall
    C No extracellular matrix
    D No cell walls

D

67. Hollow ball embryo stage:
    A Zygote
    B Morula
    C Blastula
    D Gastrula

C

68. Mesoderm forms:
    A Nervous system
    B Muscle and circulatory system
    C Digestive lining
    D Outer layer

B

69. Acoelomate organism:
    A Fully lined cavity
    B Partial cavity
    C No cavity
    D Multiple layers

C

70. Main advantage of bilateral symmetry:
    A Diffusion
    B Asexual reproduction
    C Directional movement and cephalization
    D Surface area

C

71. Radial symmetry means:
    A One plane
    B Multiple planes
    C No symmetry
    D Only embryonic

B

72. Importance of differentiation:
    A Reversion to stem cells
    B Enables specialization
    C Reduces diversity
    D Prevents tissues

B

73. NOT a body cavity function:
    A Nutrient distribution
    B Protection
    C Hydrostatic support
    D ATP production

D

74. Blastopore forms mouth in:
    A Deuterostomes
    B Protostomes
    C Diploblasts
    D Acoelomates

B

75. Anus first development:
    A Protostome
    B Diploblast
    C Deuterostome
    D Acoelomate

C

76. Lack of mesoderm affects:
    A Nervous system
    B Digestive lining
    C Skeletal muscle
    D Epidermis

C

77. Pseudocoelom is:
    A Fully mesoderm
    B Between ectoderm and mesoderm
    C Between mesoderm and endoderm
    D No cavity

C

78. Segmentation advantage:
    A Reduced metabolism
    B Independent movement
    C No redundancy
    D Loss of specialization

B

79. Body cavity evolution implies:
    A Reliable classification
    B Misleading classification
    C Independent evolution
    D Universal coeloms

B

80. Planarian gas exchange due to:
    A Complex systems
    B Thin body and no coelom
    C Muscles
    D Flame cells

B

81. Longitudinal muscle contraction:
    A Body elongates
    B Body shortens
    C Flattening
    D Twisting

A

82. Planarian digestion path:
    A Mouth → intestine → anus
    B Mouth → pharynx → digestion → phagocytosis
    C Pharynx → mouth
    D Mouth → flame cells

B

83. Planarian without cilia:
    A Moves normally
    B Reduced movement
    C Uses pharynx
    D Drifts

B

84. Flatworm excretion vs digestion:
    A Same function
    B Excretion regulates water balance; waste exits digestive opening
    C Opposite roles
    D Both absorb nutrients

B

85. Liver fluke infection occurs when:
    A Skin penetration
    B Eating infected fish
    C Snail contact
    D Drinking water

B

86. Multiplication stage in flukes:
    A Miracidium
    B Sporocyst/redia
    C Cercaria
    D Adult

B

87. Tapeworm attachment structure:
    A Flame cells
    B Intestine
    C Scolex
    D Nerve cord

C

88. Tapeworm digestion absence works because:
    A Internal digestion
    B Absorbs nutrients directly
    C Uses host nerves
    D Only liquid diet

B

89. Increased infection risk:
    A Sanitation
    B Cooked fish
    C Raw fish + poor sanitation
    D Fewer snails

C

90. Comb jellies independent evolution evidence:
    A Cilia
    B Symmetry
    C Muscles + through-gut
    D Marine habitat

C

91. Coral bleaching triggered by:
    A Low pH
    B High temperature
    C Low light
    D Salinity

B

92. Incorrect man-of-war pairing:
    A Gonozooid — gametes
    B Gastrozooid — prey capture
    C Dactylozooid — defense
    D Pneumatophore — float

B

93. Comb jelly confusion due to:
    A Bioluminescence
    B Colloblasts
    C Mixed symmetry
    D Marine habitat

C

94. CO₂ reduces reefs because:
    A Heat
    B Nutrient overload
    C Reduces carbonate availability
    D Photosynthesis overload

C

95. Which group undergoes molting?
    A Mollusks
    B Arthropods
    C Annelids
    D Echinoderms

B

96. Which group lacks true tissues?
    A Cnidarians
    B Sponges
    C Mollusks
    D Arthropods

B

97. Which germ layer forms nervous system?
    A Endoderm
    B Mesoderm
    C Ectoderm
    D None

C

98. Which body cavity type is fully mesoderm?
    A Acoelomate
    B Pseudocoelomate
    C Coelomate
    D None

C

99. Which is NOT a body cavity function?
    A Distribution
    B Protection
    C Movement aid
    D Prevent specialization

D

100. Lophotrochozoa include:
     A Arthropods
     B Mollusks and annelids
     C Echinoderms
     D Sponges

B