NECO Biology Practical Answer – 2018 June/July Expo
NECO Biology Practical Answer and Theory/Essay Answer
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(1ai)
Specimen A – Elephant Grass.
Specimen B- Grasshopper
Specimen C- Lizard.
Specimen D – Housefly.
(1aii)
Specimen B – Insecta
Specimen C – Reptilia in the sub-phylum vertebrata.
(1aiii)
Specimen D
Houseflies serve as intermediate hosts for several parasitic worms Eg Round worms in their developmental stage.
(1aiv)
Specimen B:
(i) Has fore and hind wing for flight.
(ii) Has cuticle to minimize loss of water.
(iii) Has antenna for feeling.
Specimen C:
(i) limbs are developed for movement on land.
(ii) dry scaly skin to protect it from drying up.
(iii) its digits end in claws for grasping and climbing
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(2a)
(1ai)
Specimen A – Elephant Grass.
Specimen B- Grasshopper
Specimen C- Lizard.
Specimen D – Housefly.
(1aii)
Specimen B – Insecta
Specimen C – Reptilia in the sub-phylum vertebrata.
(1aiii)
Specimen D
Houseflies serve as intermediate hosts for several parasitic worms Eg Round worms in their developmental stage.
(1aiv)
Specimen B:
(i) Has fore and hind wing for flight.
(ii) Has cuticle to minimize loss of water.
(iii) Has antenna for feeling.
Specimen C:
(i) limbs are developed for movement on land.
(ii) dry scaly skin to protect it from drying up.
(iii) its digits end in claws for grasping and climbing
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(2a)
G – Coconut fruits.
H – Cashew fruits.
I – Tomato fruits.
J – Tridax fruits.
(2aii)
In a tabular form:
G | Wind | The flowers do not produce scent
H | Animal | Some flowers have coloured calyx
I | Animal | The flowers do not produce nectar
J | wind | It possesses honey guide
(2aiii)
In a tabular form
Under G:
-It has a based and stony endocarp.
-It undergoes marginal placentation.
-Coconut Fruit is dry indehiscent
-It has hard epicarp.
Under I:
-It has scattered scent.
-It undergoes axile placentation.
-Tomato is a dry dehiscent.
-It has a fleshy epicarp.
(2b)
Diagram
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(3)
(i) Flamboyant flower
(ii) Filament
(iii) Style
(iv) Sepal
Filament: it attaches the base of the flower and support the anther
Style: it assist with fertilization by being the location where pollen tubes travel to deliver sperm cells to the egg
Petals: it attracts pollination such as butterflies, bees and bats
————————————————————–
(3)
(i) Flamboyant flower
(ii) Filament
(iii) Style
(iv) Sepal
Filament: it attaches the base of the flower and support the anther
Style: it assist with fertilization by being the location where pollen tubes travel to deliver sperm cells to the egg
Petals: it attracts pollination such as butterflies, bees and bats
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