Neco GCE 2018 Practical Biology Answers/Expo/Runz
(1ai)
Experiment to demonstrate osmosis in a living tissue(Yam tuber)
(1aii)
A-The volume of the sugar solution in the yam tuber increases
B-The volume of water in the yam tuber remains unchanged
(1aiii)
It serves as the semi-permeable membrane
(1aiv)
Set up B serves as the control experiment
(1av)
-Cellophane paper
-Pig bladder
(1avi)
-It makes osmo-regulation possible
-It enhances regulation of waterin the urinary tubules
(1bi)
Toad
(1bii)
I-Webbed digit
II-Nostril
IV-Tympanum
V-Nictating membrane
(1biii)
Amphibian
(1biv)
-Possesion of webbed digit for swimming
-Possesion of wide mouth for sieving and eating
-Possesion of long hind limb for escape
(1ci)
Atlas
(1cii)
I-Neural spine
II-Neural arch
III-Neural canal
IV-Vertebraterial canal
V-Centrum
(1ciii)
Neck
1bi) Specimen c = Toad
1biii) Class Amphibian
1biv) – For vison
– Locomotion
=======================
2ai) E = Tomato Fruit
F = Cowpea fruit
G = Coconut fruit
2aii) E = Man
F= Explosive mechanism
G = Water
2aiii) i – Stalk
ii – Endocarp
iii – Seed
iv – seed
v – Endocarp
vi – Mesocarp
2bi) Bird
2bii) Aves
2biii) i – Head
ii – Beak
iii – Opening into the eye
iv – Wing cover
v – Foot
vi- Claw
2biv)
i – For picking grains
ii – To detect Vibration
iii- For flight
iv – for scratching the sand or fround
v – For steering during flight
=======================
3bi.
I structure of the sperm >>spermatozoa
II. Acrosome
I. Nucleus rich in DNA
III. Mitochondria
Iv.Tail sheath
3i. It enhances penetration of eggs during fertilization.
ii. Help to move
(1ai)
Experiment to demonstrate osmosis in a living tissue(Yam tuber)
(1aii)
A-The volume of the sugar solution in the yam tuber increases
B-The volume of water in the yam tuber remains unchanged
(1aiii)
It serves as the semi-permeable membrane
(1aiv)
Set up B serves as the control experiment
(1av)
-Cellophane paper
-Pig bladder
(1avi)
-It makes osmo-regulation possible
-It enhances regulation of waterin the urinary tubules
(1bi)
Toad
(1bii)
I-Webbed digit
II-Nostril
IV-Tympanum
V-Nictating membrane
(1biii)
Amphibian
(1biv)
-Possesion of webbed digit for swimming
-Possesion of wide mouth for sieving and eating
-Possesion of long hind limb for escape
(1ci)
Atlas
(1cii)
I-Neural spine
II-Neural arch
III-Neural canal
IV-Vertebraterial canal
V-Centrum
(1ciii)
Neck
1bi) Specimen c = Toad
1biii) Class Amphibian
1biv) – For vison
– Locomotion
=======================
2ai) E = Tomato Fruit
F = Cowpea fruit
G = Coconut fruit
2aii) E = Man
F= Explosive mechanism
G = Water
2aiii) i – Stalk
ii – Endocarp
iii – Seed
iv – seed
v – Endocarp
vi – Mesocarp
2bi) Bird
2bii) Aves
2biii) i – Head
ii – Beak
iii – Opening into the eye
iv – Wing cover
v – Foot
vi- Claw
2biv)
i – For picking grains
ii – To detect Vibration
iii- For flight
iv – for scratching the sand or fround
v – For steering during flight
=======================
3bi.
I structure of the sperm >>spermatozoa
II. Acrosome
I. Nucleus rich in DNA
III. Mitochondria
Iv.Tail sheath
3i. It enhances penetration of eggs during fertilization.
ii. Help to move
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