[WAEC GCE 2017 BIOLOGY PRACTICAL ANSWERS]

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(1ai)
Pectoral Girdle(Scapula

(1aii)
I-Scapula
II-Spine of scapula
III-Coracoid
IV -Glenoid cavity
V-Acronium
VI-Metacromion

(1b)
(i) Humerus
(ii) Ball and socket Joint

(1c)
(i) It holds the upper limb to the axial skeleton
(ii) Attachment of muscles
4a)
I)Operculum
II)Hind limb
III)Tympanum
IV)Trunk
V-eye
VI-lateral line
VII-dorsal fin
VIII-caudal fin

4bi)
Tabulate
Vertebra
i)they are poikilothermic or cold-blooded animal
ii)they have fins which are used for movement in water
iii)they have naked or moist and glandular skin with no external scales
iv)they do not show parental care
v)they have a two chambered heart
Vertebrate B
i)they are aquatic animal
ii)they have gills which used for gaseous exchange
iii)the skin is covered by scales but few are with out scale
iv)they show parental care for young onces
v)they have three chambered heart

4bii)
i)they both posses scale
ii)they both posses eyes
iii)they both posses respiratory organs
4ci)
A-amphibian
B-pisces

4cii)
i)they posses fins which are used for movement
ii)they posses swim bladder which posses swim bladder which enables them to maintain buoyancy in water
iii)they posses lateral line system for detectin of vibration

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4a)
I) Operculum
II) Hind limb
III) Tympanum
Iv) Trunk

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