UPD Bio 12 Lab Dichotomous Key (Animal And Protozoan Diversity)

1.     A. Unicellular --------- Kingdom Protista (2)

B. Multicellular ------- Kingdom Animalia (9)

2.     A. Parasitic / no locomotory organelle ---------  P. Apicomplexa (Gregarina)

B. Free-living / with locomotory organelle ------ 3

3.     A. Mode of locomotion: Flagella/pseudopodia – P.   Sarcomastigophora (4)

B. Mode of locomotion: Cilia ----- P. Ciliophora (7)

4.     A. Pseudopodia ----------------------- 5

B. Flagella ------------------------------ 6

5.     A. Lobopodia / Not testate --------- Amoeba

B. Axopodia / Testate --------------- radiolaria

6.     A. Solitary --------- Euglena

B. Colonial -------- Volvox

7.     A. No proboscis -------------------- 8

B. With proboscis ------------------ Didinium

8.     A. With stalk ------------------------ Vorticella

B. Without stalk -------------------- Paramecium

9.     A. With tissue level of organization ----- P. Porifera (10)

B. With organ level of organization ----- 13

10.  A. Calcareous spicules --------- 11

B. Siliceous spicules ------------ 12

11.  A. Solitary -------------------------- Grantia

B. Colonial ------------------------- Leucosolenia

12.  A. Hexaxon ------------------------- Euplectella

B. Monaxon and Tetraxon ------ Leiodermatium

13.  A. Diploblastic ---------------------- P. Cnidaria (14)

B. Triploblastic --------------------- 18

14.  A. Medusa form dominant ------ Aurelia

B. Polyp form dominant --------- 15

15.  A. Acellular mesoglea / without septa ------- 16

B. Cellular mesoglea / with septa ------------- 17

16.  A. Solitary / Fresh water --------- Hydra

B. Colonial / Marine --------------- Obelia

17.  A. Solitary / without calcareous skeleton -- Metridium

B. Colonial / with calcareous skeleton ------ Favia

18.  A. Without body cavity ---------- P. Platyhelminthes (19)

B. With body cavity -------------- 23

19.  A. Free-living ---------------------- Dugesia

B. Parasitic ------------------------ 20

20.  A. Incomplete digestive system --- Class Digenea (21)

B. No digestive system -------------- Class Cestoda (22)

21.  A. Sexes united ----------------- Clonorchis

B. Sexes separate -------------- Schistosoma

22.  A. Int. host is pork / scolex with hooks – Taenia solium

B. Int. host is cattle/scolex w/o hooks –Taenia saginata

23.  A. Pseudocoelomate ------------ P. Nematoda (24)

B. Eucoelomate ------------------- 25

24.  A. With phasmids ----------------- Ascaris lumbricoides

B. Without phasmids ------------- Trichinella spiralis & Trichiuris trichiura

25.  A. Segmented --------------------- 32

B. Unsegmented ------------------ P. Mollusca (26)

26.  A. internal and chitinous shell / Closed CS ------ Loligo

B. With shell / Open Cs ------------------------------- 27

27.  A. Shell with 8 dorsal plates ------ Acanthozostera

B. Shell not 8 dorsal plates ------- 28

28.  A. Univalve ------------------------- Class Gastropoda (29)

B. Bivalve --------------------------- Class Bivalvia (30)

29.  A. Exhibits torsion ----------------- Cypraea

B. Undergoes detorsion --------- Phylidiella

30.  A.

B.

31.  A.

B.

32.  A. Protostomate ------------------ 33

B. Deuterostomate -------------- 44

33.  A. Closed CS --------------------- P. Annelida (34)

B. Open CS ----------------------- P. Arthropoda (36)

34.  A. With clitellum / without parapodia --- 35

B. Without clitellum / with parapodia --- Sabella

35.  A. With setae --------------------- Pheretima

B. Without setae ---------------- Limnotes

36.  A. Without antennae -------------- SP Chelicerata (37)

B. With antennae ------------------ 38

37.  A. With book gills ------------------- Tachypleus

B. With book lungs ----------------- Nephila

38.  A. 1 pair of antennae -------------- SP Uniramia (39)

B. 2 pairs of antennae ------------ SP Crustacea (41)

39.  A. Thorax divided into 3 segments / Compound eyes – Class Insecta (Periplaneta & Xylotrupes)

B. Thorax divided into > 3 segments / Simple eyes –40

40.  A. 1 pair of legs per segment ---- Scolopendra

B. 2 pairs of legs per segment --- Polydesmus

41.  A. Pleopods for swimming ------------ 43

B. Pleopods for reproduction --------- 42

42.  A. No lateral extensions / Marine ------------ Scylla

B. With lateral extensions / Freshwater ---- Portunus

43.  A. Pleopods reduced or absent ------ Pagurus

B. 5 pairs of pleopods ------------------ Penaeus

44.  A. With water vascular system / without CS – Phylum Echinodermata (45)

B. Without water vascular system / with CS – Phylum Chordata (50)

45.  A. Bilateral symmetry ----------------- Holothuria

B. Radial symmetry ------------------- 46

46.  A. With arms ---------------------------- 47

B. Without arms ------------------------ 49

47.  A. With distinct central disc / Madreporite on oral side / No anus ----------------------------- Ophiorachna

B. Indistinct central disc / Madreporite on aboral side / With anus --------------------------- C Asteroidea (48)

48.  A. With spines -------------------------- Oreaster

B. Without spines ---------------------- Linckia

49.  A. Anus on aboral side / Globular -- Echinometra

B. Anus on oral side / Flattened ---- Echinodiscus

50.  A. Indistinct head ----------------------- 51

B. Distinct head ------------------------- 52

51.  A. Notochord is restricted in tail region of larva ---- Pandocia

B. Notochord persists until adulthood -- Amphioxus

52.  A. Appendages are fins -------------- 53

B. Appendages are limbs ------------ 57

53.  A. Fishes without jaws --------------- 54

B. Fishes with jaws ------------------- 55

54.  A. Body covering is skin / No eyes ----- Class  Myxini (Hagfish – Myxine)

B. Body covering: scales + skin / With eyes ------ Class

Cephalospidomorphii (Lamprey – Petromyzon)

55.  A. Cartilaginous skeleton ------- Class Chondrichthyes

B. Bony skeleton ------------------ 56

56.  A. Lobe-finned fish ---C. Sarcopterygii (Protopterus)

B. Ray-finned fish ---- C. Actinopterygii (Hippocampus)

57.  A. Cold-blooded ----------- Amphibia and Reptilia (58)

B. Warm-blooded --------- Aves and Mammalia (59)

58.  A. Body covering: naked skin -- Class Amphibia (Bufo)

B. Body covering: scales, scutes, plates ---- C. Reptilia (Python)

59.  A. Body covering scales and feathers / Without mammary glands --------- Aves (Owl – Bubo)

B. Body covering hair / With mammary glands -- 60

60.  A. Lays eggs ------------------- Monotremes (Echidna)

B. Does not lay eggs --------- 61

61.  A. With placenta ------- Placentals (Canis, Homo, Felis)

B. Without placenta --- Marsupials (kangaroo)