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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
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
1civ)
iii- for the passage of spinal cord
iv- for carticulation
v- weight bearing
vi- for attachment of muscules and ligaments

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 – sperm cell >> spermatozoa
3bii)
I – Acrosome
II – Nucleus rich in DNA
III – Mitochondria
IV – Tail sheath
3biii)
i)It enhances penetration of eggs during fertilization.
ii)Help to propel the sperm cell

3c)
i)starch test is negative because CO2, the substrate of starch has been removed
ii)it helps trap CO2
iii)it remove CO2 from the set up
iv)experiment to show that carbon(iv)oxide is neccessary for photosynthesis
v)N is the control experiment

SEE ALSO:   NECO GCE 2017 EXAM TIMETABLE

2a)
i)
E – tomato fruit
F – cowpea fruit
G – coconut fruit
ii)
E – man
F – explosive mechanism
G – water
2aii)
I – stalk
II – endocarp
III – seed
IV – seed
V – endocarp
VI – mesocarp

2bi)
Bird
2bii)
Aves
2biii)
I – head
II – beak
III – openning into the eye
IV – wing cover
V – foot
VI – claw
2biv)
I – for picking grains
II – to detect vibration
III- for flight
IV – for seperating the sand or ground
V – for steering during flight

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