1. Class Onycophora e.g. peripatus

2. Characteristics

3. Thin cuticle, soft muscular body wall

4. Longitudinal and circular muscles

5. Spiracles scattered, irregularly over the body

6. Cilia present in genital organs

7. Body wormlike and externally unsegmented with imperfectly jointed legs each with 2 claws

8. Possession of nephridia

9. Separate sexes, direct development.

10. Possession of gills.

11. Queen or antennary gland for excretion

12. Possess antennae and antennules

13. Well developed mouthparts

14. Appendages modified for swimming, walking and food capture

15. Body divided into two 2 regions, cephalothorax and abdomen

16. They possess exoskeleton

17. possess tracheate, land living

18. Arthropods with elongated body

19. Possess a distinct head with a pair of antennae

20. Excretion by malphighian tubules.

22. Subclass Chilopoda ___ Centipedes

23. Subclass Diplopoda ___ Millipedes

24. Arthropods with fully chitinised exoskeleton

25. They have two regions, proxoma and opisthosoma

26. Well developed appendages modified for various purposes, maybe sensory, prehensile or for walking but typically four pairs of walking appendages

27. Respiration by gill or lung books or by trachea

28. Excretion by coxal glands or malpighian tubules

29. Poison glands in some

30. Sexes separate with direct development

31. Possession of a pair of chelicerae (instead of antennae)

32. The body is segmented

33. The body is covered by chitinous exoskeleton

34. Body divided into three regions, head, thorax and abdomen

35. On the head are found the following: - a pair of antennae, a pair of mandibles and 2 pairs of maxillae, adapted for sucking, biting, piercing, and chewing.

36. Two pairs of wing, some a pair, some none, when two pairs on mero and Meta thorax.

37. Three pairs of walking legs

38. Respiration is by trachea, branched spiracles

39. They have a complete digestive system, fore, mid and hind gut.

40. Salivary gland

41. An open circulatory system

42. Malphighian tubules open into the hind gut.

43. Nervous system

44. Possess a pair of large compound eye

45. Separate sexes. Internal fertilization

46. Complete or incomplete metamorphosis
Complete or incomplete metamorphosis. When complete egg – larva – pupa – adult. When incomplete egg – nymph – adult.

47. Pathonogenous , some of them reproduce by parthenogenesis in form of sexual reproduction

49. Insect have about 29 orders.

51. Success of insects

52. Small size

53. Produce large number of eggs

54. Exoskeleton for conservation of water

55. Possession of different types of mouthparts for chewing, piercing, sucker create less competition among the insects

56. Excretory product of uric acid, so they lose little or no water

57. Leg appendages modified for jumping, leaping and swimming. Locomotion.

58. A pair of large compound eyes for easy sight

59. Protective colouration or a mode of protection against enemies

60. Ability to live anywhere, air, land, water.

61. Possession of trachea for respiration

62. Possession of antennae for feeling

63. Possession of wings for flight, escape and colonization of the species and finding of food

64. Ability to metamorphosise the metamorphosis stages can exist on their own because of their possession of adaptations for their own survival e.g. gills and spiracles

65. Colonies, special insect, ability to live together and work as a committee with division of labour.

66. Agents of pollination

67. Source of protein, source of food

68. Production of honey

69. Production of silk

70. Some enrich the soil

71. Some used as a means of biological control.

72. Vectors of parasites, causing diseases, tsetse fly, mosquitoes

73. Pests of fresh, stored products

74. Some secrete poisons

75. Soft body animals which are not segmented

76. Body enclosed in a mantle which secretes the shell

77. Some with ventral muscular foot

78. They have head with tentacles

79. Complete digestive system, radula, gills, lungs, body surface

80. Some are aquatic, marine and freshwater, terrestrial, some are parasitic

81. Possession of nephridia for excretion

82. No tentacles, no eyes

83. Elongated body

84. Possess head with tentacles

85. Show spiral coiling and torsion

86. Possession of large flattened foot

87. Live in a tubular shell opening at both ends

88. They have reduced foot

89. No tentacle

90. They have bivalve shell

91. Laterally compressed rudimental head.

92. No tentacles

93. Well developed head with a crown of tentacles

94. Possess siphon

95. Chambered shell

96. Possess well developed eyes

97. The presence of a NOTOCHORD, an axial rod of the skeleton, which extends in the dorsal region of the body.

98. The CENTRAL NERVOUS SYSTEM is tubular, i. e
The CENTRAL NERVOUS SYSTEM is tubular, i.e. containing a cavity, and lies dorsal to the notochord.

99. The anterior part of the alimentary canal, THE PHARYNX, is perforated by a variable number of gill – slits which lead into the gills.