1987-04-15 — Page 25

頁一第張七第 日八十月三年卯丁曆夏

28.Which of the following

are the correct

solutions for X, Y and

1987中學會考

27.

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Revision Exercise

for

Cert. Exam. (1987)

BIOLOGY (30):

Unit 13: Multiple Choi ce

Test II (cont'd)

Directions: The following two questions refer to the graph below, which shows the relationship between the incidence of tooth decay in children and the fluoride content in part per million

(ppm) of drinking water.

Average number of tooth

decay per child

2

3

0:51 Fluoride concentration

in ppm

26.which of the following

is NOT a correct conclusion from the graph?

A. The incidence of

tooth decay drops rapidly when the fluoride concentration increases from to 1 ppm.

B. At fluoride

concentration of 0.5 ppm, the incidence of tooth decay is about 5 per child.

Children drinking fluorius Led vater have an average lower number of decayed teeth than those who drink ordinary water.

A child would have

2 decayed teeth if

he has been drinking water with fluoride concentration of 2

ppm.

27. From the graph, it

can be concluded that the most suitable fluoride

concentration In ppm in drinking water to reduce tunth decay is A. 0.5

B. 1.

C. 3

D. 5.

Directions: An experi- ment is set up as, below to show tlie liberation of carbon dioxide from insects. Answer the

following three questions with reference

to the diagram.

insect

to

1987中學會考

Z

Y

Line water

Sodium hydroxide solution Sodium hydroxide solution

Lime water

Lime

water

Lime water

Südium hydroxide solution`

Sodium hydroxide solution

Lime water

Line water

Lime water

Sodium hydroxide solution:

29. If the experiment is successful, which of the following is the correct observation of the selations in X, Y and Z at the end of the experiment?

A.milky

X

Y

Z

clear

clear

clear milky milky

B. clear milky C. clear milky clear D. clear

30.If a potted plant is

used instead of the insects, which of the following

precaution(s) is/are necessary to ensure the success of the experiment?

(1)The potted plant

should be

destarched before the experiment. (2)The pot should be

enclosed by a polythene bag. (3)The belljar is

enclosed by a black paper.

A. (1) only

B. (1) and (2) only c. (3) only

D. (2) and (3) only 31,The graph shows the

relationship between the number of cigarettes smoked daily and the rate of death due to lung cancer among the

smokers.

Number of death

due to lung cancer

per million people

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for

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`MILL & DALE PRESS

Revision Exercises

Cert. Exam. (1987)

ADDITIONAL NATHEMATICS (30)

Solutions to Exercise

1. f(x)=x2+ax +Uc+C

f(x)=3x2+2ax+u (a)Since x is a factor,

‚f · {V}~3{0)+2a{0}+b={}

30

10

10 20 30. 40 Number of cigarettes smoked each day

f(a)=(1)3⁄4+a(1)2+c=b

a+c=5.

.(2)

(1) and (2) give: aal, c=4,

*,0-1, bm0, cah (Ans.)

• (U+X}@C=ub+7@

(b)

WAH KIU YAT PO

Which of the fol.

conclusion CANNOT be deduced from the graph? -

A. Lung cancer is the most common cancer found among the cigarette smokers. B. The frequency of

lung cancer is proportional to the number of

cigarettes smoked

each days.

C. Lung cancer is leag

frequent among the non-smokers.

D. The frequency of

lung cancer for smokers of over 40 cigarettes excl day is 30 times higher than that of the non- smokers.

Directions: The following three questions refer to

a situation in which & man was confined in a close chamber without nuy ventilation. 32.which of the

following graph best represents the change of breathing rate of gan? (Horizontal the axis: time; vertical axis: breathing rate).

1.

R.

N

3.Which of the

following change in the room would account for the change of breathing rote of the man” AA increase of

nitrogen concentration

1. An herease of carbon dioxide concentration

C. A decrease of

oxygen

concentration

#10152

Directions: The following three questions refer to an experiment in which five epidermal strips of the leaf. of Thoee

discolor are immersed in 5 solutions of concentrations from

0.1 M to 0.5 M. After 10 minutes the cells of the epidermisnre observed under microscope and their appearance is shown below.

In solution {

In solution R

IN

96lution q

In solution S

•In solution T

55. Which of the following

No

D. An increase of

moisture

54. If enough soda lime

was placed in the room, which of the following graph best. represents the change of breathing rate of the man? (Horizontal axis: time; vertical axis: breathing rate). A.

BP:PC-2:3 (Ang.) -Aġsin, (3+1) BQ-BC÷3BA where q lies on BC and

AQ:00-1:3 (ii)In ABCQ,

(Ana.)

(3+2)OP=2QC+39B

-20C+3(9G+CB)

-5QC+3CB -5(PAC)+3CB

(5AC+4CB)

=5AC+4CB

But 5AC+4CB=2AC+3AG+3CB+CB

20

=2AC+3AN+CB

39P-JAB+2AC÷CE

(Ano.)

(a)Substitute zaxsiy into

Z+i

z+2

**x+ïy+i.

x+iy

·3AB

is the correct concentration of the solutions?

Σ

9.3 M

0.4 M

0.5 M

0.1 M

0.2 M

0.5 M

0.1 M

0.5 M

0.4 M

0.2.M

Concentration of the solution

Solution R Solution 5 Selution

0.5.M

e'

(x+2)+y

2

2

+y+2x+y=0

Hi Fii

which is the required locus, an equation of

a circle with centre (-1,-1) and radius

√(-1)2+(-4)2-0

1.6. 15 (Ans,)

(b) tane

e-, •[2] -2

the polar form of √3+1=2(cos rising)

• (√+i)"

*2(confieing)

(cos risin")

Similarly,

·B-1

(Ans.)

Solution P Solution Q:

0.1 N

0.4 M

RO

N70

4.5.4

0.4 M

1.2.M

0.5 M

三期星 日五十月四年七八九一曆公年六十七國民華中

36.The above information indicates that the osmotic potential of the protoplasm of the epidermal cell is

A. 0,1 M

B. 0.2 M4

C. 0.5 M

D. 0.4 M

37.The epidermal cells. of the lauf of Rhoen

iscolor ure preferred to other type of cells for this experiment because these epidermal cells A. are larger than

other type of cells.

B. have a cell wall

more permeuble

than other type of cells.

C. bave a cell

membrane more permeable thu other type of cells.

D. have u coloured

cytoplyan.

Directions: The following three questions refer to the graph below, whi ch shows the change in weight of potato strips placed in sucrose solution of different asmotic potential. The nitial weight of each potato strip is 2.0 g..

Ratio of final weight te

initial weight

-5-10-151-20 -25

Osmotic potential of sucrose solution (MPa)

38.The final weight of the potato strip placed in water is A. 1.2 g

B. 1.6 g

C. 2.0 g

D. 2.4 K

39.What is the water

potential (MPa) of the potato calls? A. -5

B. -10

C. -15

D. -20

pancreas

glucose

lycogen

liver

blood glucose level

41.What is X?

А. Майтане

B. Insulin

G. Bile

D. Pancreatic juice

42.X reaches the liver

through

A. blood

D. lymph

C. pancreatic duct D. bile duct

45.Which of the following statements is CORRECT?

A. There is no

relationship between the concentration of X and the blood glucose level.

B. High concentration

of X leads to the increase of blood glucose level.

C. Low concentration

of X leads to the increase of blood glucose level.

D. High concentration of X decreases the amount of glycogen in the liver.

44.Which, of the following #tatements is true for all poikilothermic animals?

A. Their body

temperature

fluctuates with that of the surroundings.

B. Their metabolic

rate is usually high.

C. They cannot survive in cold weather,

D. Their body

temperature is constantly low.

45. During the winter in: temperate climates, -the adil us, and

caterpillers of butterflies are not alive. On the other. hand, the adults and

larvae as vell so the pupae of honey bees

cap overwinter. What is the reasonable explanation of the above phenomenon?

A. The butterflies are

poikilothermic whereas the boney bees are homoiothermic. B. Both butterflies

and honey bees are. poikilothermic but the hive can be kept warm in winter.

ARIEZ

40.Which of the following

is/are demonstrated in this experiment?

lasmolysis occurs when the external osmotic potential.. is lower than -10 (2)Sucrose molecules

diffuse into the potato strips. (3)The cell membrane

of the potato cella

is semi-permeable.

A. (1) only

B. (2) only

c. (3) only

D. (1) and (3) only

Directions: The following

4.

questions refer to the di agrum below:

(from above results)

+cos

2+ bx + c

a-b+c=0.

at (3,0) 9a+3b+c=0.

at (1,12). a+b+c=12. (2)-(1);

2a+b=0 b-20 (1)-(3):

C. The adults and

caterpillera of butterflies are poikilothermic

while their pupae are homoiothermic. D. The butterflies

cannot obtain food in winter but the honey bees can,

6. The functions common

to the skin of a mammal and the epidermis of a flowering plant are (1)to protect the

internal tissues. (2)to prevent the

invasion of harmful organisms.

(3)to aid in exchange

of gases.

b)

i) tank

i..y-xtan

(Ang.)

which is the equation of OP.

at (-10)

.(1),

.(2)

.(5)

c=9 (Aus.)

b=6 ..α-3

The equation of the curve ia:

y=9+6x-3x2

(ra)

(b)Since (x+2) i

factors,

• 1 ( 2 ) = ( − 2) 3 +

1.e.4a+c8′′

(c)Again,

AC

(i) Using the result of

(a),

(342)AP-2AC+3AB

where lies on BC and

(x+2) (1+y)i+(1+y)y

(x+2)2 + y2

Since this expression

is purely imaginery, the real part is zero,

-2.com()+1sin())

{√3-1)"

-2(cosisin)

(√3+1)+(√3-1)"

(Ans.)

1

x-1

and y-12

P(xy)

(ang.)

(1)

(4)to prevent the

undue loss of

water.

Which of the

following

combinations is true?

A. 1, 2 and 3 only B. 2, 3 and 4 only. C. 3, 4 and 1 only D. 1, 2 and 4 only

47. The blood vessel

which supplies oxygen and Butrients to the heart is

A.. Vena cava. B. Pulmonary vein C. Auṛtu

D.. Coronary artery

Directions: The following. three questions are based on the diagram below.

I

glass tubes

balloon

-bottle

rubber

sheet

48.Which of the following structures of a manimal is analogous to the

rubber sheet?

A. Lung-

B. Diaphragm

C. Intercostal muscle D. Body wall-

-

49.Which of the following

structures of a

mammal is analogous to the balloon in the apparatus?

A. Alveoli

B. Lungs

C. Larynx

D. Traches

50.Which of the

followings is THE when the rubber lieet is pushed up from position X to

position Y?

glass tube.

100

inn

ano

.UT

Pressure inside

increased? decreased

balloons

air flow long

JO. 3218

balloon.

decreused

decreased

Lucreased

Increased

increased

Pressure inside

the bottle

increaseil

decreased

Solutions:

26. D 27.

increased

decreased

decreas

B

28. B

29. D 30 D 31. A 132. C 30. B 34. D

35 B St. B

37. D 38. D 59. B 40. D 41. B

42. A

43. C 4.4. A 45. B 4. D

47. D 48. B 49. B 50. D

te

४

-4x

(ii)Volume required

-yax

(ii)c=-4

(c) ('x" (1-x) * dx

22

tan dx

-tean2 Sax2dx

2

3. h

Ttan2x0

Jo. 1+x

2

-Thtand cubie

uni ta

(Ana.

Where

sec ode

Aec

a)(1-x).“

(b)x^(1-x) = ( x ) { i + * ̈) + ¤

putting X-tane

.5

Bánd this is a max. pt.

The required ares

-(9+ bx-3x2)dx

-(9x+3x2-x"}},

328 units

(лин.)

Nows,

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