1.
[1]
Construction of dams submerges
large areas of forests,
how does this contribute to the green house
effect ?
2. [2] What is the function of
the trachea ? Why do its walls not collapse
even when ther is less air in it ?
3. [3]
Giving
a schematic diagram of bio-gas
plant explain the
production of bio-gas and manure.
Give the composition of bio-gas.
4.
[3]
Draw
a neat labelled diagram of a
neuron.
5. [3]
Name a harmone secreted by (a) Pancreas
(b) Pituitary (c) Thyroid. Write one function of each of the
harmones.
6.
[5]
(a) Draw a diagram of human alimentary canal and
label on it :
(i) gall bladder (ii)
liver (iii) pancreas
(iv) small intestene.
(b) What
is emulsification of fats?
Why is it necessary ?
OR
(a) Draw
the human excretory system
and label :
(i) Kidney (ii)
Aorta
(iii) Ureter (iv) Urinary bladder.
(b) What
is the purpose of sending blood
to the kidney’s for filtration ?
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