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Waec 2016 Biology practical question and Answers – May/June Expo

Waec 2016 Biology practical question and Answers – May/June Expo

VERIFIED WAEC 2016 BIOLOGY PRACTICAL QUESTIONS AND ANSWERS

Tuesday 26th April 2016
BIOLOGY PRACTICAL ALT. A 9.30AM – 11.30AM

(1ai)
Observation:Blue black colouration is observed
Result: Starch is present
(1aii)
Observation:No colour change is observed
Result:Starch is present
(1bi)
TABULATE
Specimen A:
-Mould is absent
-Sporangium is absent
Specimen B:
-Mould is present
-Sporangium is absent
(1bii)
-Presence of moisture
-Suitable temperature for the growth of mould
(1biii)
-Mould
(1biv)
Saprophytic
(1ci)
(1cii)
Yolk:Supply nutrient to the embryo
Air space:Provide air for the developing embryo
Shell:Give shape and protection to the embryo
Chalaza:Hold and suspend the embryo in position
====================================
(2a)
H-Below the abdomen
K-Thoracic cavity
M-Below the abdomen
(2bi)
-Bile
(2bii)
-Emulsification of fat
-Digestion of fats and oil
(2biii)
Specimen H
(2ci)
TABULATE
Specimen H/Liver:
-Dark red in colour
-Hepatic vein present
-Divides into lobes
Specimen K/Lungs:
-Bright red in colour
-Hepatic vein absent
-Lobes present
(2cii)
-Thin membrane allow easy diffusion of oxygen and carbondioxide
-Moist surface for dissolving gases
-Large surface area for exchange of gases
(2d)
K-It is used for respiration
M-It is used for excretion in animals
(2e)
(4ai)
S-aquatic habitat
U-Terestial habitat
W-Terestial habitat
=========================================
(4aii)
S-Amphibian
U-Reptilia
W-Insecta
(4bi)
-Both have heag
-Both have eyes
-Both have digits
-Both have fore and hind limbs
(4bii)
TABULATE
Speciman S:
-Tail absent
-Nuchal crest absent
-Gular fold absent
-Scales absent
-Has moist skin
Specimen U:
-Tail present
-Nuchal crest present
-Gular fold present
-Scales present
-Has dry skin
(4ci)
-Male
(4cii)
-Has brightly coloured part
-Nuchal crest present
-Gular fold present
(4d)
-Body colour blend with surrounding for camouflage
-Short stout fore limbs acts as shock absorber for landing
-Long, stron hindlimbs for hopping on land
-Long tongue attached to the front lip for easy catching of prey
-Buldging eyes to see above water when body is submerged
(4e)
Spec T->Spec W->Spec S

Posted by on April 25, 2016.

Categories: Uncategorized

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