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WAEC GCE 2017 - BIOLOGY PRACTICAL ANSWERS

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WAEC GCE - BIOLOGY PRACTICAL ANSWERS

Exam Time: Monday, 11th September,
2017
Biology 3 (Alternative to Practical)
2.00pm – 4.00pm
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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

(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
(ii)Elodea
(iii) Photosynthesis
(iv) The oxygen can be tested by bringing a glowing splincter close to it,which will be rekindled.

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(2a) 
A - Symbiotic relationship (mutualism)
B - Predation 
C - Symbiotic Relationship 
D - Epiphytism 
E - Parasitism Beneficial. 

(2b) 
Beneficial
A
C


Harmful
B
E


(2ci)
A and B

(2cii)
C and D
2ciii)
B

(2d)
A-cattle and cattle egrets
B-Fox and hen
C-Moss and tree
E-Pig and tapeworm

(2ei)
C-Symbiotic relationships are a special type of interaction between species. Sometimes beneficial, sometimes harmful, these relationships are essential to many organisms and ecosystems, and they provide a balance that can only be achieved by working together

(2eii)
D-epiphytism is a form of mutualism in which one plant lives on the surface of another.


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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:
Vertebrate A
(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 detection of vibration

(4di)
-They posses pigment on their skin which act as a camouflage against its predators
-They posess scales on the skin which reduces water loss from the body 
-They posses digits or claws use for self defence

(4dii)
-Water
-Land

(4diii)
-They are use for the preparation of local medication
-They are use for food














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