NECO GCE Biology Practical Solution Questions and Answer – NOV/DEC 2017 Expo Runz.

Experiment to demonstrate osmosis in a living tissue(Yam tuber)
A-The volume of the sugar solution in the yam tuber increases
B-The volume of water in the yam tuber remains unchanged
It serves as the semi-permeable membrane
Set up B serves as the control experiment
-Cellophane paper
-Pig bladder
-It makes osmo-regulation possible
-It enhances regulation of waterin the urinary tubules
I-Webbed digit
V-Nictating membrane
-Possesion of webbed digit for swimming
-Possesion of wide mouth for sieving and eating
-Possesion of long hind limb for escape
I-Neural spine
II-Neural arch
III-Neural canal
IV-Vertebraterial canal
iii- for the passage of spinal cord
iv- for carticulation
v- weight bearing
vi- for attachment of muscules and ligaments

I – Will not germinate
J – will germinate
K – will not germinate
I – water or moisture is absent
J – Water is present as a factor for germination
K – Oxygen is absent
K – Pyrogallic removes oxygen which include sodium hydroxide, removes carbon(iv)oxide.
J – Water aids swelling and activation of enzymes.

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

E – tomato fruit
F – cowpea fruit
G – coconut fruit
E – man
F – explosive mechanism
G – water
I – stalk
II – endocarp
III – seed
IV – seed
V – endocarp
VI – mesocarp

I – head
II – beak
III – openning into the eye
IV – wing cover
V – foot
VI – claw
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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