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Nabteb 2016/17 Biology Practical Answers – May/June

we dont do free runz again. this the evidence that we did it. don't expect free answers starting from today on.

enjoy your today paper.

NABTEB. PRACTICAL BIOLOGY ANSWERS

2a)

Specimens:
A-Cowpea plant
B-Maize plant

2b)
A-Reticulate veination
B-Parallel veination

2c)
A-Epigeal germination
B-Hypogeal germination

2d)
Specimen A contains root nodules.Inside these are found bacteria.These bacteria help to fix atmospheric nitrogen to the soil.When rainfall fixed
nitrogen dissolve in it to form nitrate which is good to the crop

2e)
A-protein
B-Carbonhydrate

2f)
-Leaves of A is oval in shape while that of B is parallel
-Leaf of A has reticulate veinations while that of B has parallel veination
-Leaf of A is not hairy while leaf of B is hairy
-Carbium is present in leaf of A while it is not in B

3a)
Specimen C-Scapular bone

3b)
Shoulder

3c)
Anchors and attaches muscles which work the arm

3d)
-Hair/fur cover the body
-There is a pair of pinnae
-There is a pair of eyes with eyelids
-Body is divided into head,neck and trunk with tail

4a)
D-Tilapia fish
E-Toad

4b)
D-water
E-land

4c)
TABULATE
D-Tilapia fish:
-Scales are present
-Fins are present
-Operculum is present
-Tail is present
E-Toad:
-Scales are absent
-Absence of fins
-Operculum is absent
-Tail absent

4d)
Serves as food(protein)to man

5a)

TABULATE

Ecological factor:
-Amount of rainfall
-Wind speed
-Hotness and coldness of the day
-Turbidity
-Atmospheric pressure
Instrument used:
-Rainguage
-Anenometer
-Thermometer
-Secchi disc
-Anaeroid barometer

5bi)
Zooplankton->Tilapia->crayfish->kingfisher

5bii)
Producer->Zooplankton
Tertiary consumer->Kingfisher

1)
i)Essential for chlorophyll formation
ii)Nucleus
iii)ATP(Adenosinetriphosphate)
iv)It helps the gases to diffuse in and out of the plant
v)Hepatic portal vein
vi)Tannins,Anthrocyanins,Akaloids and carbondioxide

viii)
-Osmoregulation
-Regulate the water level in the body
-Remove waste products
-Keeps the blood PH constant

ix)
-Enzymes are specific
-Enzymes are affected by temperature
x)Regulation of internal environment
xi)Tongue,Eye,Ear and skin
xii)Homogolous chromosome
xiii)-Calyx
xiv)Cholera,Ebola,Typhoid,Hepatitis
xv)The mouth,The nose,The skin,Birth

GOODLUCK

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