NECO 2017 Biology Practical Expo Answer – June/July
A=Toad
B=Thoracic Vertebra
C=Lumbar vertebra
D= Pride of Barbados
E=Millipede
F=Agama Lizard
1aii)
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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
| SPECIMEN B | SPECIMEN C |
|---|---|
| i)They are 12 in number
ii)they are large iii)They are rigid iv)less vulnerable to degenerative conditions v) less massive |
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 |
1av)
i)Both have large centrum
ii)Both have neural spine
iii) Both support the body and protect the spinal cord
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)
Specimen – 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
2bii) Tabulate I and J
specimen-I
i)multi-seeded
ii)endocarp is juicy
iii)mesocarp is juicy
iv)several carpel are founded
v)several ovaries
specimen-J
i)one seeded
ii)endocarp is hard
iii)monocarp may be fleshy or fibirous
iv)monocarpel
v)superior ovary
| specimen-I | specimen-J |
|---|---|
| i)multi-seeded
ii)endocarp is juicy iii)mesocarp is juicy iv)several carpel are founded v)several ovaries |
i)one seeded
ii)endocarp is hard iii)monocarp may be fleshy or fibirous iv)monocarpel v)superior ovary |
2biii)
K-dispersal by explosive mechanism
L-dispersal by wind
3ai)
M-Adult butterfly
N-prawn
O-earthworm
P-tapeworm
3aii)
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.
3aiv)
OBSERVABLE feature of N:
i)antenea
ii)pincer
iii)abdomen
iv)swimmerets
v)walking legs
3av)
M-pollination of flowers
N-serve as food to man
3bi)
Observable features of specimens P
i)scolex
ii)neck
iii)proglottids
3bii)
Tabulate
-Features-
i)scolex
ii)neck
iii)proglottids
-functions-
i)It has hooks/suckers to help it hold on to the host’s tissues
ii)holds and supports the scolex
iii)bears the testes and ovaries for reproduction
| -Features- | -functions- |
|---|---|
| i)scolex
ii)neck iii)proglottids |
i)It has hooks/suckers to help it hold on to the host’s tissues
ii)holds and supports the scolex iii)bears the testes and ovaries for reproduction |
3biii)
O-the phylum it belongs to annelida
P-the phylum it belongs to platyhelminthes
3biv)
i)they help to loosen the top soil
ii)their faces serve as manure to the soil
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