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NECO: Real confirmed Biology Practical Question & Answers now posted and available for 2018


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(1ai)

Experiment to demonstrate osmosis in a living tissue(Yam tuber)

(1aii)

A-The volume of the sugar solution in the yam tuber increases

B-The volume of water in the yam tuber remains unchanged

(1aiii)

It serves as the semi-permeable membrane

(1aiv)

Set up B serves as the control experiment

(1av)

-Cellophane paper

-Pig bladder

(1avi)

-It makes osmo-regulation possible

-It enhances regulation of waterin the urinary tubules

(1bi)

Toad

(1bii)

I-Webbed digit

II-Nostril

IV-Tympanum

V-Nictating membrane

(1biii)

Amphibian

(1biv)

-Possesion of webbed digit for swimming

-Possesion of wide mouth for sieving and eating

-Possesion of long hind limb for escape

(1ci)

Atlas

(1cii)

I-Neural spine

II-Neural arch

III-Neural canal

IV-Vertebraterial canal

V-Centrum

(1ciii)

Neck

1bi) Specimen c = Toad

1biii) Class Amphibian

1biv) – For vison

         –  Locomotion

=======================

2ai) E = Tomato Fruit

       F = Cowpea fruit

       G = Coconut fruit

2aii) E = Man

         F= Explosive mechanism

         G = Water

2aiii)  i – Stalk

           ii – Endocarp

           iii – Seed

           iv –  seed

           v – Endocarp

           vi – Mesocarp

2bi) Bird

 2bii) Aves

2biii) i – Head

          ii – Beak

          iii – Opening into the eye

          iv – Wing cover

          v – Foot

          vi- Claw

2biv) 

       i – For picking grains

       ii – To detect Vibration

       iii-  For flight

       iv – for scratching the sand or fround

       v – For steering during flight

=======================

3bi. 

I structure of the sperm >>spermatozoa

II. Acrosome

I. Nucleus rich in DNA

III. Mitochondria

Iv.Tail sheath

3i. It enhances penetration of eggs during fertilization. 

ii. Help to move
Number one

1ai)

Specimen A — Elephant
Specimen B —Grasshopper
Specimen C — Lizard
Specimen D — Housefly
(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
(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
*Snt*

2ai)
G=Coconut fruit
H=cashew fruit
I=tomato fruit
J=tridax fruit
*snt*

(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

Posted by Da WebGeek


Posted by on May 29, 2018 in NECO

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