2018/2019 Neco Biology practical Answers May/June

*NECO 2018 BIOLOGY PRACTICAL*

(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

(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

(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

(1av)
A (Elephant grass) -> B (grasshopper) -> C (Lizard)

(1bi)
Specimen E – Termite
Specimen F – Spider

(1bii)
Drawing

(1biii)
In a tabular form:
Under E
1. Possession of six walking legs.
2. Possession of three body segments.
3. Possession of thorax.
4. Absence of hairy body.

Under F:
1. Possession of eight walking legs
2. Possession of two body segments.
3. Absence of thorax.
4. Possession of hairy body.

(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

2ai)
G – Coconut Fruit
H – Cashew Fruit
I – Tomato Fruit
J – Tridax 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

(3ai)
Flamboyant flowers.

(3aii)
In a tabular form:
Under parts:
1. Filament.
2. Style.
3. Petals.
4. Sepal

Under Number:
1. 5
2. 1
3. 5
4. 5

(3aiii)
Filament – It is the male organ used in production.
Style – It is the female organ through which the gametes pass.
Petal – It produces sweet juices for the insects.

(3aiv)
Pollination.

(3av)
(i) It has nectary gland.
(ii) The anthers contains few pollen grains.
(iii) The stigma is lobbed with sticky surfaces for easy adherence of the pollen grain.

(3bi)
M – Tilapia fish.

(3bii)
Pisces.

(3biii)
-It is poikilothermic animal.
-It possess dorsal fin for swimming.
-The body is covered with overlapping scales.

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