NECO 2017 Free Biology Practical Answers – May/June Expo

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?NECO 2017 CHEMISTRY PRACTICAL ANSWERS?

100% VERIFIED CHEMISTRY PRACTICAL ANSWERS

1ai)
A=Toad
B=Thoracic Vertebra
C=Lumbar vertebra
D= Pride of Barbados
E=Millipede
F=Agama Lizard

1aii)

1aiii)
B===>located in chest, attached to the ribs
C===>located in loin

1aiv)
Tabulate
SPECIMEN B
i)They are 12 in number
ii) they are large
iii) They are rigid
iv)less vulnerable to degenerative conditions
v) less massive

SPECIMEN C
i)They are only 5
ii)They are the largest
iii)They are flexible
iv) more vulnerable to degenerative conditions due to its weight – bearing function
v) more massive

1v)
i) Both have large centrum
ii)Both have neural spine
iii) Both support the body and protect the spinal cord

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2ai)
G- foot of domestic fowl
H-foot of domestic duck
I-tomatoe fruit
J-coconut fruit
K-dry bean pod
L-combretion fruit

2ii)
i-they both have claws
ii-they both have three toes in front and one at the back
iii-they are both used for walking

2iii)
Spc- H is webbed while sec-G is not

2iv)
i-for scratching
ii-for walking/running i.e locomotion

2v)
i-prominent hind limb for running away from treats
ii-prominent claws for scratching the ground in search of food

2bi)
I- simple sacculent fruit – berry
J-simple sacculent fruit – drupe
K-simple dry dehicent fruit- legume
L-simple dry dehiscent fruit-samara

2bii)
SPECIMEN I
i)multi seeded
ii) Endocarp is juicy
iii) Mesocarp is juicy
iv)several carpels are fused
v)several ovaries
SPECIMEN J
i) one seeded
ii)Endocarp is hard
iii) Mesocarp may be fleshy or fibrous
iv) monocarpels
v) superior ovary

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2biii)
K===>dispersal by explosive mechanism
L===>disposal of wind

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3i)
M-Adult butterfly
N-prawn
O-earthworm
P-tapeworm
3ii)
M-the class to which it belongs is INSECTA
3iii)
OBSERVATION Feature of M:
i)A pair of clubbed antenae
ii)A head,thorax and abdomen
iii)wings.

3iv)
OBSERVABLE feature of N:
i)antenea
ii)pincer
iii)abdomen
iv)swimmerets
v)walking legs

3v)
M- pollination of flowers
N-serve as food to man

3bi)
OBSERVATION FEATURES OF SPECIMEN P
i) scolex
ii)Neck
iii)proglottis

3bii)
Tabulate feature and function

Feature
i)Scolex
Function
Scolex bear hooks and suckers with which the worm clings to the wall of the host’s intestine

ii)
Feature
Neck
function
Hold and supports the scolex

iii)
feature
Proglottis
Function
Bears the testes and ovaries for reproduction

3bii)
O===>the phylum it belong is Annelida
P==>the phylum it belong is Platyhelminthes

3biii)
i)They help to loosen the top soil
ii)their faeces serve as manure to soil

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