¶¶ NECO GCE 2017 Biology Practical Solution Answer – Nov/Dec Expo

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*NECO GCE BIOLOGY PRACTICAL ANSWER*


(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



3a) 

    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 germination

           K - Oxygen is absent


3aiii)   k - Pyrogallic removes oxygen which include sodium hydroxide, removes carbon(iv)oxide.

            J-  Water aids swelling and activation of enzymes. 


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


3c


i. Starch test is Negative 

ii. Because Co2 the substrate of Starch has been Removed

iii. It help 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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