1973-05-12 — Page 19

REFERENCE UFC

12 MAY

育教濟經頁三第張五第日十初月四年丑発LITWAHALLU YAT PO

1973英文中學會考試題預習專欄

UNIM ME AMEM

生物科(廿九)

Biology (29)

Answers to the questions of last issue No. 28

Section A:

1. B 2.

Section B: Ans. 1.

BOKAROM

77

D.

18.

12. E

19.

13. C 4. B

20.

21

22.

(a) Reproduction is defined as the process by which all living organisms are able to reproduce their own species. Since the individual organisms grow old and die, the survival of the species depends upon the replacing of these individuals by new ones.

The process of reproduction varies tremendously from one kind of organism to another, however, it can be distinguished into two basic types- the asexual and sexual reproductions.

Asexual reproduction occurs commonly in plants, protozoa, coel -enterates, bryozoa and tunicates. A unicellular animal, the amoeba, during asexual reproduction, divid -es. into two more or less equal

元位单 日一十月五

最低價 香港

krif

報日橋筆

portions, each portion then grow ing until it has acquired the usual size of the fully grown organism.-

In sexual reproduction it involves two individual bodies; each supplies a specialized reproductive cell, the gamete.

In mankind, a male se

sperm, subsequently

the with

a female gamete, the egg, to form the fertilized egg. The process of fusion of two gametes is known A new individ- as fertilization.. ual may develop from the fertiliz- ed egg.

Sexual reproduction is advant- ageous biologically for it makes possible the recombination of the best inherited characteristics of the two parents and provides for the possibility that some of the offspring may be better adapte

Ged to survive than either parent was.

(b) (1) Sexual re

reproduction is characterized by the development of a new individual organism from a fertilized egg produced in turn by the fusion of two gametes, the sperm and the egg. The fertilized egg then develops into a minute embryo by rapid cell divisions which normally occurs in the oviduct into the uterus where it stays and undergoes its embryonic development.

(11) The developing embryo is first obtained its nourishment supply by breaking down the mucosa After of the uterus with enzymes. it has been attached to the uterin decidua by a placenta. The placen -ta is therefore the respiratory, nutritive and excretory organ for the embryo. The two umbilical

blood vessels (artery and vein) leave the embryo at the navel,

and pass through the umbilical cord to break up into capillaries

日二十月五年三七九一展公年二十六國民華中

nervousness, fast heart-

六期星 in the chorionic villi and thus lie in a pool of maternal tissue. The umbilical vein carries blood from embryo to the blood capillari -as in the villi, and the umbili- cal artery carries the blood from the capillaries to the embryo. It must be emphasized that the blood of the mother and that of

are not in direct"

the ado, but are separated

by a thin membrane through which oxygen, nutrients and other mater ials diffuse from the blood of the mother to that of the embryo; nitrogenous wastes and carbon dioxide diffuse from the embryo to the maternal tissue.

Ans. 2.

(a) Thyroid gland

position --- This gland, of two lobes joined by an isthmus, lies on either side of the trachea below the larynx.

Function --- In the gland, there are follicles contair -ing a colloid material which is very active in function. This substance is termed thyroxine (15H11

The

thyroxine is composed of the aminoacid and 65% by

It: weight of iodine. functions to regulate the general metabolism, growth and sexual development of the body. If the thyroid gland is removed in a young animal, the growth of bone is arrested and the sexual maturity fails.

Deficiency of thyroxine causes cretinism, myxoedemɛ and goitre. Overproducta or of this hormone increases. metabolic rate resulting

in the loss of body weight,

計統合綜價市票股所易交券證間四港香

·牧市價 收市價 收市價

beat, and excessive, sweat-

ing. It can be corrected

by the removal of part of the gland

(b) The Islets of Langerhans

position These are groups of cells embedded in the pancreas. Function--- Their secret- ion is called insulin, This hormone regulates both the oxidation of sugar and its storage as glycogen; if deficiency of this hormone leads a disease called diabetes.

:) Adrenal gland

position --- There are two white glands lying adjacent to the anterior ends of the kidneys in mammals. Function

Each gland

consists of the outer: cortex and inner medulla of different microscopic structures.

In the medulla, adrenalin produces. This hormone causes: (1) heart-beat increased, pulse

rate accelerated, blood pres- sure increased and deep in inspiration.

(2) more glucose is oxidized to

produce energy.

In the cortex, hormones

cause:

(1) normal balance of salts in the

blood that is. to regulate the metabolic process of the body. (2) normal metabolism of carbo-

hydrates in the body.

(3) the activities of sex organs. (4) effect on the skin pigmentat-

ion. Deficiency of this

hormone leads Addison's.

disease.. bronze pigmentat ion of skin.

開市價 最高價 最低價者彍東

BETON ACHIOR ECHIL

開市價最高價 最低價

香港 遠東 Berts

九龍

Verifi

收市價收市價

銀行窥

匯地公司

15.20

16.00

16:00

15.90

15.80

兆景炸蝦榮

蔬生銀行 垢連銀行

164.00 167.00 164.00

306.00

290.00

314,00 802.00 312.00 296.00 284.00312.00

167.00 166.00 312.00 292.00

166.04.

信托公司

4.75

5.00

4.75

· 4.90.

(五)倉填翔

314.00 812.00 296.00

何

公司

294.00

LIZTIZA

32.50

33.00

1.50

1,50

1.50

海外信託銀行业

5.60

6.10

5.60

6.50

6.10

6.05

..

6.70

6:70

6160

6.60

倉(除各項)

36.00

37.00

雙鴻、

2.20

2.225

大理銀行(除股權之 左脚銀行

2.225.

太古船塢(除各項)

14.00

14.40

7.50 £7.50

7.30.

·7-50

7:5

新昌集團:

20.50

$22.00

.00*

开船廠

1.70

$1,70

(二)公用套

和記地產

7.10

7.25

7.20

安全貨食

2.70

2,70

石(六)酒店類

45.00

42.50

香港電燈......

32.50

31,00

743.50

32.00

44.25

44.00

釧酒店

2.70

2,85

新興盛發純

2.15

2.175

2.10

・城

32.25 31.50

星港地资

1.15 1.15

若公司

24:00

24.00

中華煤氣(除各項>

萬邦批費

大酒店

童話公司

49.50 46.50

電車公司(除各項之

49.50 48.50 -22.00

48.50

生生

2000.

2.15

2.05

惯都酒

2.20

60.00 60,00 - 59.00:59.00

2.20

保

30.00

30.00

29.50

**AT

1.75

*1.75

油蔴地小輪(除各項)

40.00 $8.00

HEAD

美麗華酒店,

25.00

26.00.

九龍巴士新股)

18.50

21.50 21.50 -21.60

.覑珠島發殷་

1.00

1.00

1:00

K

12.50

12.50

天星小輪

∵地(A)

3.70

3.85

8.70 3.85

百樂酒店

1.27

1.40

三工商企業類

(七)紡機製友類

翔(集團)

2.80

2.80

種開

2.70

-3.00

3.00

2.80

1.30

1,40

古實葵除各項)

新基(除条項)

6.50

6.40.

6.35

HIDE

2.00

2.025

信用

12.40

12.40

天鹅蛋

南豐紗厰

2.80

均益會(哚各項)

BAZA

南洋紗防

20.50

11:50

11.00

∙11.50

BURR

:6.00 ·6,00

大利

13.60

13.60

█魚位:

澳國、

0.88

0.90

̇新體表

12.50 12.50

環球電子(除息!

FR

南海紗廠

二閈簿和記(除息)

門打

4.50 4.50

5$,50 48.50

52.00 55.50

Z

HEDE

泰盛發膠

4.30

-4.50

4.50

4:20

長江製衣:

3.85 4.00

(限

****

飄新製衣

-ELIS

85.00 83.00

转俗

1.90

·1,00

依時滅友

-虎豹(除各項)

世界(除名

1.26

1.26

1.20

恆類:

9.59

9.20

9.50

:9:45

****

80

1.80

茂昌眼鏡

2.05

2.05

∴香港開藥

·6,70

6,40

KFUNG

我寳(除络

6.30

6.00

6.10 6.00

#XE

永安法

11.20

10.00

11.201 11.00

HECKE

Kera

(八)航業類. 亞洲航樂:

2.90

14.00 14.50

ALE

BARD

19.00- 13.20

i8.80 18.60

新世界(除各項:

5.20

5:40

5.40

5.40

帝后船药(除底)

5.50 5,505

*1.30 1:10

1.21

∵山地

2.00

2.00

2,00

8:40 8.30

8.30

原生工

̇伯和

-103.00.107.09 99.00 107,00

106.00 105.00

保利工程

4.80

5.00

5.00

合機 船務(A股) 當機提船(B)

9.00 9.30

1,00

1,00

龍谷謝

安寧

萬邦航榮

4.75

4.90

$1302

4.00:

4.00

CAR)

40.00

40.00

***

4.00

4:10

̇记卡佛(B)

2.80

3.00

3,00

3,00

明仁伯靈

立興:

新英園:

4.35

B-XUR

-4,20

4.30

或勝榮睫

保榮航業

4.55 1.27

4.80

1.30

生力啤酒(除各項”

新同崖企

東方貨櫃

3.25 3.30

∴:瑞興公司

大昌地

10.40 10.80

10.80 10.40

10,40 10,40

肉機公司

43.00

44.00

44,00

·( 九)投资㬎

ARDA

實光製造廠,

10.30

9.40

10.20 -10.20 10.10

聯合企業

7.50

大新公績:

10.50 11.00

11.00

10.80

∙10.80

怡和實藝

5.00 4.90

國學機

生

-3.00

3.20

3.00

我是貸款:

屈臣氏

91.00

88.00 90.00 90.00

香禨性(A役,

44,00 42.00

44.00 44.00.

44.00

14.00

2.50

2.65

2.65

2.60

七子

M

贊助工業

25.00 25.00

25.00

1.30

1.44

1.10 1.00

1,00

1.06

交地

1.50

∙1.75

·能太投棄 *太平洋限券 魚和楚 ......

・利理由等(株) 6.40 6.40

·ARRA

2.50

2.50

15.10 15.50

1.80

1,80

0,80 0.75

0.75

0.85

1:00

3.10 2.90 2.90

1.10

1.10

1

森那美

6.40 6.40

11.00

2.90

3.00

3,20

港九工廠

.3.20

3.20

∙HER?

1.00

0.80

1.00

0.80

永昌齡:

1.25

1.30

1.10

·科技家海外投資

3.95

(四)地递築類

大生地選

7:00

常太平洋地產:

2.80

7.20

7.20

7.15

啟明

業

1.08

1.08

1.05

+

BNER (AAT)

10.80 10,80

長江酱

10.80 10.20 9.00 8.50 11.90. 1.90

10.80 10.50

寫推優業

1.00

1,02

1.02

晚合橡膠

·2.90

2.90

8.50

8.80

9.00

明耀發膠

1.64

1.75

1.70

缺嵗信託(除息

1.90

PETRAR

1.00

102

1.00

永然雞弹

2.00

(十一)其他

2.00

2.00

1.80

自由發表

1.04

1.04

1.00

非立新

0.43 0.44.

2.60

3.10

2.50 3.00

2.50

香江物果

0.96

1,00

1.00

RISEE

11.00

11.00

3.00- 3.00

*AE

二星期輋業(除息,

9.00 9.00

1.20

.10)

1.15

1.10

謝聯企業

2.30

2.60

2.50

真年

謝漢

3.70

1.70.

1.80 1.30

1.70

1,05 1,25

1.20

1.70

MWEN (ALL)

HTERN

20.50 20.50

$1.00 1.90

1.00

2.00

1.80

1.80

0.80 0.80

0.80

2.50

2.10

2.50

2.10

2.75

2.85

2.75 2.75

2.10 1.90 2.10

1.90

2.00

2.00

2.00

大石麵

1.30

1.30

1 ཎྜཎྜ ཋ ཤི ། སྦྲཤྩ འབྷཱབྷཱམཱ — ⪜ཎྜ སྙཤྩ 13111ཀཽ 1|:31: 29 (35ཏཱཿརཱི3 (ཧུཐྭཧྲཱིཿ 51|21ཀཽ 3|3 (2|ཧཱི3 ་ཏཱཾ། 3ཎྜ8དྡྷརྨཱཎྜ། །ཧཱི

32.75

32.50

36:00

·36.00

14.40

14.30

24.00

12.50

6.00

12.00

3.85

8.60

15.50

2.75

2.7

2.75

0.43

0.43

11.00

9.00

8.80

20.50

0.96

1.90/

$1,90

1.30 1.30

2,30

2,40

2.275 2.275

14.00 14.80 13.50 14:00 18.50 14.80

1.75

1.75

1.70

1.75

̇成交黩:香港交易所為三千五百一十二萬元

遠已交易所属四千四百天十九萬元

濃(除各項)

身交易所為三千六百七十九萬元

•¥3+10

自行物

热中四十年

・但果上期

·每天式爱

地,廣,報中實收而,於廣告 址凡告以数之有效價畫西告 姓不奢惟有效百宏廠其歌

雪佈者·可..

捷明著事

·见效非常

弁慶告一蜇

分分便程

別廣

告

類告特养

大效收廉用費活

* 12 40

19 20 15 15 10 57 15 49 13