Free Neco 2018 Biology Practical Answers- June/July Expo

(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. 

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.

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

(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

2ai)

G – Coconut Fruit

H – Cashew Fruit

I – Tomato Fruit

J – Tridax Fruit

(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

(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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By Romtech on Wednesday, 30 May 2018