NECO GCE BIOLOGY PRACTICAL QUESTIONS AND ANSWER EXPO – NOV/DEC 2017

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NECO GCE Nov/Dec 2017 Biology practical Questions and Answer Expo

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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

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

(2ai)

E – Tomato fruit

F – Cowpea

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)

II – for picking grains

III – To detect vibration

IV – For flight

VI – For scratching the sand or ground

VII – For steering during flight

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

(3ai)

I – Will not germinate

J – Will germinate

K – Will not germinate

(3aii)

I – Water or moisture is absent.

J- Water is present as a factor for production.

K – Oxygen is absent

(3aiii)

K – Pyrogallic acid removes oxygen while sodium hydroxide removes carbon(iv)oxide.

J – Water aids swelling and activation of enzymes

(3bi)

Sperm cell (spermatozoa)

(3bii)

I – Acrosome

II – Nucleus.

III – Tail

(3biii)

I – Produces lytic enzymes for breaking the zona pellucida of the ovum.

III – It helps propel the sperm cell.

(3c)

(i) Starch test is negative

(ii) Because CO2, the substrate of starch has been removed.

(iii) It helps trap CO2.

(iv) It removes CO2 from the set-up.

(v)experiment to Show that Carboni

(vi) Oxide is Neccessary for Photosynthesis

(vii) N is the Control Experiment

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NECO GCE BIOLOGY PRACTICAL QUESTIONS AND ANSWER EXPO – NOV/DEC 2017

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