2016年5月20日 星期五
2016年5月19日 星期四
F4 Bio 2nd Term Test 4 Ch9
F4 Biology Test 4: Nutrition and gas exchange in plants
A. Multiple
Choice (10marks)
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Q.
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1
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2
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3
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4
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5
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6
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7
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8
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9
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10
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Answer
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A
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B
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C
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D
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B
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D
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C
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A
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C
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D
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Wrong no.
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B Conventional questions
1 a, b nitrogen / phosphorus / potassium / magnesium / sulphur / calcium / iron
(any 2) 1×2
Con: nitrate
is not an element
c major elements 1
d trace elements 1
e fertilizers 1
2 a Diffusion 1
Con/Rel: Photosynthesis
/ respiration
b Gases in the
atmosphere diffuse into the air space through structure R. 1
Gases dissolve in the moist
surface of the cells in tissue N and diffuse directly into the cells. 1
Gases in these cells
diffuse to the neighbouring cells, finally reaching the cells in tissue M. 1
c There are many air spaces among the cells, allowing gases to diffuse
freely. 1
The surface of the cells is
moist. This allows gases to dissolve in the moisture and then
diffuse into the cells
easily. 1
Rel: Adaptive
feature of leaf
3 a Independent variable: light intensity 1
Dependent variables: rates of
carbon dioxide uptake and release 1
Con: Confusion
between i.v. & d.v.
b Number / surface
area of sun leaves and shade leaves / surrounding temperature
(any 2 or other correct
answers) 1×2
Con: Weak
concept of c.v.
Shade leaves: 2 + 3.5 = 5.5 arbitrary
units of rate of carbon dioxide uptake 1
Con: Still
do not know the cancelling effect of respiration with photosynthesis
d Sun
leaves: 5 arbitrary units of light intensity 1
Shade leaves: 2 arbitrary
units of light intensity 1
e Shade leaves reach the
compensation point / carry out photosynthesis / produce food
earlier in the day / at lower light intensities. 1
2016年5月15日 星期日
F4 Bio 2nd Term Test 3 Ch8
F4 Biology Test 3:
Transport in humans
A. Multiple
Choice (10marks)
Q.
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1
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2
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3
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4
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5
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6
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7
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8
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9
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10
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Answer
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B
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D
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A
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B
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A
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B
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A
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D
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C
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C
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Wrong no.
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B Conventional questions
1 a X: tricuspid valve 1
Y: semilunar valve 1
Z: bicuspid valve 1
b There will be a backflow of blood into the left atrium when the left
ventricle contracts. 1
The
heart will become less efficient in pumping blood to different parts of the
body
(except the lungs). 1
2 a To provide a large surface area for the exchange of materials between
the blood and body cells.
1
b The arteriole end of the capillary bed is closer to the heart. 1
The
blood pressure is higher due to the pumping action of the heart. 1
The blood pressure
decreases along the length of the capillary as the distance from the heart
increases 1
and blood flow encounters
high resistance of the capillary wall. 1
c At the arteriole end of the capillary bed, blood pressure in the
capillaries is higher than the
pressure of the fluid
surrounding the body cells. 1
Some components of plasma
(e.g. water, minerals, sugars, lipids and hormones) are forced out
of the capillaries to form
fluid F (tissue fluid). 1
d Fluid F provides a
relatively constant environment for the normal functions of the body cells.
1
Fluid F serves as a link
for the exchange of materials between the blood and body cells.
1
e Contraction of the skeletal
muscles surrounding vessel M drives fluid F forwards. 1
Valves in vessel M prevent the backflow of fluid F. 1
3 a P 1
The blood at N
receives a greater force from the pumping action of the left ventricle 1 and thus the blood pressure is higher. 1
b Valves (1) and (3)
are open. 1
Valves
(2) and (4) are closed. 1
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