WAEC GCE 2017 Biology Practical Answer – Nov/Dec Expo

WAEC GCE Biology Practical Questions and Answer – NOV/DEC 2017 Expo Runz.

4D updated

2a)
A- symbiotic relationship
B- predation
C- symbiotic relationship
D-epiphytsm
E-parasitism

2b)
Tabulate
Beneficial
A,C,D
harmful
B,E

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1ai)Pectoral Girdle(Scapula
1aii)I-Scapula
II-Spine of scapula
III-Covacord process
IV-Acronium Process
V-Gleniod cavity
VI-Metacronium process

1bi) Humerus
1bii)Ball and socket joint

1c)
-It holds the upper limbs to the axial skeleton
-Attachment of muscles.

1d)
I. Sunlight
II. Oxygen
III. Bubbles of gas
IV. test tube
V.funnel
VI .water
VII.Beaker
VIII.Elodea

1e)
i)To show that oxygen is given off During photosynthesis.
ii)
-Sunlight
-carbon (iv)oxide

1f)
i.water
iiElodea
iii. Photosynthesis
iv. The oxygen can be tested by bringing a glowing splincter close to it,which will be rekindled.

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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

4di)
i)they posses pigment on their skin which act as a camourplage against it predators
ii)they posses scales on the skin which reduce water loss from the body against its predators
iii)they posses digits or claws use for self defence
4dii)
i)water
ii)land
4diii)
i)they are use as food

ii)they are use for the preparation of local medication

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