2017/2018 Neco Gce Biology Practical Questions And Answers
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(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
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(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
==============================================
(2ai)
E - Tomato fruit
F - Cowpea
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)
II - for picking grains
III - To detect vibration
IV - For flight
VI - For scratching the sand or ground
VII - For steering during flight
3a)
i - Will not germinate
J - will germinate
K - will not germinate
3aii) i - water or moisture is absent
J - Water is present as a factor for germination
K - Oxygen is absent
3aiii) k - Pyrogallic removes oxygen which include sodium hydroxide, removes carbon(iv)oxide.
J- Water aids swelling and activation of enzymes.
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
3c
i. Starch test is Negative
ii. Because Co2 the substrate of Starch has been Removed
iii. It help trap CO2
iv. It removes Co2 from The set up
v.experiment to Show that Carboni
vi Oxide is Neccessary for Photosynthesis
vii. N is the Control Experiment
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