1979-03-23 — Page 31

日三十月三年九七九一曆公年八十六國民華中

育教備 頁三第張八第5日五十月二年未己磨复

WAH KIU YAT PO

報日僑華

五期星

iodine

(3) Permination of the pollen

Train

spit extends

landwards

1979

(4) fusion of the gametes

La g

(2)

中學會考試題預習專欄

(5) entrance of the nollen

tube into the ovule

and.

The correct sequence is:

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(3)

BIOLOGY (23)

^. (1)(2) (3) (4)(5)

(4)

B. (1)(3)(2)(5)(4) 07 (2)(3)(1)(5)(M) D. (3)(2)(1)(5)(4) EL (2)(2)(1)(4)(5)

Unit 13: Model Test

Multiple Choice questions (Paper II) Choose the best answers in the

following questions.

A slide of onion epithelial cells is examined under the following microscopes. For a particular region of the sample, by which of the fol- lowing microscope can number of cells be seen?

Microscope Eye-piece Objective

more

Refer to the above experiment. answer questions 6-9.

6. The correct sequence of the

experiment: to show that light. is necessary for thesis is

A. 1-2-3-4

B-1-2-4-3.

021-3-2-4:

Cosyn-

-3-2 2-3

7. In step 3, the leaf is put

in boiling alcohol to

A. dissolve the starch.

A

10X

15%

B

20x

.C

20x

5x

10X

B. remove chlorophyll from

the Leaf.

D

40x -40X

5X

10x

C. preserve chlorophyll in

the leaf.

D. rix chlorophyll in the 10. E fix the leaf

A bell-jar is seperated into two compartments as illustrated below.

Light

B A

Bell-jar

Cardboard.

Cockroach

Compartment:

B

a cockroach a burning candl a cockroach 2 cup of KOH.

EXP

12

solution

3

a cockroach a pot of

plant

green

a cockroach nothing

The cockroaches would die in which of the following

sequences?

1-2-3-4

21-2-4-3.

1-3-4-2

D. 3-1-2-4

B. 4-1-2-3

The following structures are involved in gaseous exchange

n different organisno,

To what types of organisms do

X, Y and Z belong?.

Fish, tadpole and frog.

B. Tadpole, insect and plant.

C. Frog, plant and insect.

D. Plant, frog and fish.

E. Plant, fish and tadpole.

Which of the following statements about the experi- ment is correct?

A. In step 1, the shaded part would turn yellow 24 hours after the cork is removed.

B. In step 2, the leaf before

iodine staining is green in colour except the shaded partN

Iodine solution is used to sterilize the leaf.

D. The non-shaded part of the

Tear is the control..

13. The following diagram shows.

a bird's egg

Which of the following: statements about the bird's

is not correct?.

A. Fat is mail stored in . 3. Disc is the egg cell.

Shell 0 is for protection. D. Membrane P is for pro-

tection.

Vater is mainly stored in

14. Which of the following

crosses

is most likely to produce large number of recessive off-spring 2

AAA X Aa

B. Ac X Aa.

Aa X aa

DAAX AA

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Geography (24)

37. What characteristic coastal feature is shown by the photo- graph below? Explain its formation.

In step, mark X represents the place that is stained blue-black by iodine solution.

The content of starch in leaf but not glucose, is used as measure of photosynthesis because

(1) glucose is not the directi product of photosynthesis. (2) glucose is a soluble

substance which may be lost during the experi- mental processing.

(3) glucose is immediately

converted to starch during photosynthesis.

(4) a leaf cannot be deglucosed

before the experiment. A. (1) a

The principle of geous exchange

in the structures shown in

the above diagram is based on.

the activities of the intercostal muscles and

the diaphragm.

the setting up of an air current or a water current the changes in the atmos- pheric pressure,

the diffusion process which takes place at a moist surface.

the solubility of gases in water.

The concentration of carbon

and (2) only

B. (2) and (3) only c. (3) and (4) only

D. (2), (3) and (4) nly B. (1), (2), (3) and (4)

ANS:

ave

38. The figure below shows the

population changes of Hong Kong between 1961-71,- Describe the changes in population distribution and. suggest reasons for them.

The photograph shows a temporary lagoon at Tap Shek Kok in the Castle Peak Area. It is a sheet of salt water separated from the open sea by sand banks.

The lagoon is formed by the landward extension of a spit when the waves attack the bay at an oblique angle. The swash and backwash will cause material to be moved along the

The above diagram shows a stamen, a Carpel and a germinated pollen coast. This movement is grain. Answer questions 10-12-

10. Which of the following is a

correct combination?

Mremale gametes

B. 2-produces pollen grains, C. 3-receives pollen grains D. 5-develops into fruit E. 6-female gamete. 11. Structure 8

(1) is a cytoplasmic exten-

sion of the pollen grains.

dioxide in blood should be kept (2) is postively chemotropic.

constant."

Is this statement correct?

Yes, this would keep the rate of breathing constant.

B Yes, this would lead to a

rapid and deep breathing movement.

No, carbon dioxide is a metabolic waste which should be excreted.

(3) obtains nutrients from

structure 2 only. (4) carries the male nucleus

to the ovule.

12.

DIMO, carbon dioxide is com-

pletely excreted during

expiration.

EtNo, a constant concentration of carbon dioxide is not

necessary...

A. (1), (2) and (4) only B. (1), (3) and (4) only c. (2) ans (3) only

D. (2), (3) and (4) only

(2), (3) and

After successful pollination, the following events take place.

(1) division of male nucleus

into two nuclei (2) formation of the pollen.

tube

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called longshore drift. A sudden change in the direction of the coastline does not affect its course and the material. being carried will then be. deposited in slack water to form a spit (Fig. 1A). The outer end of the spit may curve landward because of wave. refraction and eventually join the coast. The narrow stretch

of water that it encloses is

known as a lagoon (Fig. IB).

Land

Land

Sea

spi

́urves

PIEKLATION CHAKRE OF HONG KONG.

ANS,

The population pattern of Hong Kong has undergone Significant changes in the last decade. Both rural-urban migration and decentralization have contributed greatly to the changes.

AREAS OF DECREASED

POPULATION

Several of the areas recorded a decrease

1) North Saiking

they are:

Amongst the areas of decreased population, North Sai Kung recorded the highest rate. This district is on the extreme east of the Colony and is not connected by major transportation lines to the urban area. The refief is hilly, soil fertility has been highly deprived as exposed to strong winds and heavy rainfall. Villages are small. Many of the villagers have abandoned the land to seek their living. in the urbanized areas of Hong Kong or even foreign countries,

2) Sha Tau Kok and Tai O

Sha Tau Kok in the extreme north of the New. Territories and Tai O on the western coast of Lantau Island. have the second highest rate of decrease. Sha Tau Kok, which is situated on the border between the N. T. and China, has been delimited as a restricted area and has not been benefited from tourism. Tai O is a fishing village and is linked with the city centre by ferry. Both of them are too far away from the urban centre and have therefore suffered from the incovenience of transportation.

3) Other areas in the N. T.

Other areas such as

Tung Chung Cheung Shau, and

S. Lamma, each of them

recorded a slight decrease.

To sum up, the decrease in population of the above areas in the New Territories is.

mainly a result of rural-urban migration. The decrease increases with increasing. distance from the city centre. Some of the people go abroad, but a great majority of them move to the newly established satellite towns.

4) Hong Kong Is, and Kowloon

Both Hong Kong Island and Kowloon, which are regarded as the centre of the city, have recorded a decrease in population. It is mainly a result of decentralization. To release the population pressure

of the developed urbanized areas and make room for commercial activities, satellite towns are set up. Thus the people move out from the urban centre to the newly de veloped. regions in the ourskirts. It is especially true for the C. B, D.,

the rate of decrease is more than 100%; In other residential- commercial districts, such as: Mong Kok, they have the same experience. Within these districts, the upper floor of building meant for residential purposes are being increasingly used for offices

AREAS OF INCREASED

POPULATION:

Most of the centre districts recorded an increase in their population during 1961-71.

1) Tsuen Wan and Tüen Mun

Amongst the areas of increased population, Tsuen Wan and Tuen Mun recorded the highest rates. The opening up of these two areas to industrial satellite towns is the most important factor, Labours are attracted to there as many factories have moved into these two areas from other parts of Hong Kong such as Sha Tau Kok. The construction of government low-cost housing estates has been an encouraging factor, too.

2) Ping Shan and Sheung Shui

Some areas in the New Territories, where transporta- tion is easy, also recorded sharp to moderate increase, such as Ping Shan, a rural centre on the Yuen Long Plain and Sheung Shui, These areas of more convenient transporta- tion have attracted many rural settlers from the remote places. Besides, Yuen Long and Sheung Shui are also under the government development schemes,

3) Urbanized Areas

Some areas near the urban centre, such as Ngau Tau Kok and Aberdeen had ·

experienced increase too. It is

also a result of decentralization.

They are industrial regions with large number of government low-cost housing units.

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