1967-03-09 — Page 17

9 MAR 1967

电鞠罩

日月三年七六九一曆公年六十五國民中

S. S Sandhu

BTOLOGYD

買一榮張五第

5九廿月正年未丁僭

WAH KIU YAT PO

英文中學會考試題預習專欄

生物科 (十九)

·山度士。!

,並定本年五月 則被文英文各佔

區峦于上午上至中 初辦小學四班,香港補習夜校 午十二時止,中型低習夜校適應的 中爆满,開辦珠算專科

獎品。(成)

一招收新生。

| 將茳面大季入澳試 縮,彼等所錄用者,].[特、官立夜

將爲好激師,將來中、中學九英文部,定

主任胡熙電動雕上

银行,中文大學校 衔蕾利沙伯中學禮堂

日德國人士將于本站》 。

飩下年度醌每一狲般學校將频收男官立夜中學.

∴C 新正仳 J 韶糁 郞于下午二時,三位巴州道七十六驶纳

「[校接治。一卷)

| 中壓及小學,中學

用祕文及英文教授之學影響之人士為,在

女生,拟合對此孔」九龍英文部

將雞 香港

̇大拉

佔酒不,來者 不

一踝會使中,困在 辨男

定期畢業

(B Se Dip. Bo

REPRODUCTION: There are

1 wo methods of reproduci 100 D

hydra:

(a) ASEXUAL REPRODUCTION

(b) SEXUAL HEPRODUCTION

19 ASEXUAL REPRODUCTION: I'yle mode as

reproductiob is

adopted when the conditions are favourable i.e.plenty.

of food, water and sunlight. This process is alen

Kown a BUDDING or GEMMATION

4 part of the body-wall near the basal and bulges out1

by the process of avagination of all the layere 1.e

exdodern, nesogloes and endoderm forming a bud. This

bud grows and soon smaller buds appear in a circle around the apex These start growing and soon foru

tentacle白 In the meantime the part of the bud near to the parent body wall begins to become narrow

An opening is formed at the apex of the bud which nas also become a little raised. Thus the mouth and the hypostome develops The constriction soon narrows some more until the daughter hydra seperates from the parent hydra and begins a new life

留港德人創辦

瑞濱,增設段算部

德英並重學校

六時半為標,已

習拉丁文

有中小學 中學部

|至英皇道二十六號 j咎于畢業髗俗。可 四法,經測驗及格者 十小時學完加減乘除

中文中學會考試題預習專欄

九六七年

物理科 (十九)

鄧炳恩。

A光度學填允題与問答計算進题解

溴光題

parent hydra is nothing strange.

黑照度

照溃

Sometimes the daughter hydra may begin budding while still on the parent hydra Therefore to see two of three generations on

正

育傑塑

樂源。(左)柏立薪鍵際校平對,教育司會乃保致歡迎詞。

八岁)柏立基師鰌事校落證,周年爵士授國與業

華僑教育

設I別為AB燈光度則

60

=

50

1.

*

162)

(50)

1501

Y

Į

1621

(50)

ma/(3)

1.

(50)2

ř

B.反我折射及老璃儀器填-

題

其反射線与入射線必

物體置於兩平面鏡間若者鏡或60)

則可太像個

خلاطاطا

收

REPRODUCTIon Ry BuddinG

SEXUAL REPRODUCTION: This made of reproduction is adopted when conditions are un favourable 1.e: lack of food, water or sunlight. Hydra is bisexual i.e. It is both male and female. Testes and Ovary are seen on. the same individual 'But to prevent self-fertilisation the testes ripen first

and the ovary last

TheTripe testes break open and the speras are shed into theater. They swim about act ive Ly by Lashing their tal from side to side

When the ovary is ripe the ettoderm covering: cne e splits and the egg is exposed."

The sperms swimming in the neighbourhood are directed: towards the exposed egg due to chemotaxis i e. stimulus. due to the chemical. released into the water when thesewaiwa became exposed. Ohe of. the sperms reaches the egg and the head-part: or nucleus enters into it leaving the tail.. portion outside. The tab.rucled fuse and the egg becomes fertilised.

(Thofetilised egg or ZYGOTE"

"as is"19"talled now, pegins development. It undergoes a series of divisions until- po-252 cells are fomeda, The cells arrange themselves to form a no blow ball called BLASTULA. The central

cavity sealed the BLASTOCOELE.This bravely anon_f Lila up due to further division of cella

The EMBRYO develops a protective" esas around itself by1 secreting a horny shell. It then drops away from the parent hydra and settles to the bottom of one oond where it remains inacsave, when the favourable conditions set in the embryo divides, actively and becomes elongated. Soon the homy case splits and the elongated embryo emerges forming a ring of buds which soon develop into tentacles. A hypostome is also formed on whica Appears the mouth andlalbaty nydra enie rzes

2. KEW.11

3 置燭25 技

解

設置燭不過

z

23 枝

5.04

在A燈之鉛

c之照度為E剡

f= Ea Es

5 应置於距 5

酲

問答計算題

50

80.196.

239 PR-AB

火燭

(2~)

x=0.58米,

燭光毅之測定法

BAR

LIBRA

儀

法

已知欲

測定B燈之燭无数将A嫂固定 於光度計之一惻得6位置給

Exposed

Merry

coat

SELUAL REPRODUCTION,

SYMB10915 ▼ This is the 'condición, when, two, o'rganismajli ve,

together for mutual benefit

In Hydra Viridis lives a greenFunicellular algae Zobohlo ra

ellae inside the cells of the Endodermis Thie aiga

obtains ahelter: and food in the form of Carbon Dioxide

and Nitrogenous products required for the synthesis of ital food. In return the hydrs receives sure of the products,

of photosyntheses like sugars and Oxygen which ore essential for ite: life proceeses-

Therefore benefit is mutust and this condition "15"called) SYMBIOSIS Other examples are LICHENS fungus & alga), Mycorrhiza (roots & fungus) Nitrogen-fixing bacteria in,

oto of Leguminous plants, roots

Q.I

Q.

Draw a Labei w cell of Spirogyra. Give the Reproduction in Spiregyri

則依照度定律

8種之面鏡

王鐘距离之3倍則及物體手鏡

之距离分别为 烧

3將拒體置於凹面鏡前 等於焦距一天收置於

處像

]]

料秒

/秒

15.欲必焦距12種之凸透鏡得較物體

使用倍之实像,則物體應置於區

6集近視者其明視距离為5吋,而欲閱 續眼20吋之書籍,則在配戴透

7.放大鏡之焦距為f屨则放大学之精

價值

倍 倍;其近似值為

焦距為f之凸透蹺

fe凸透鏡同軸相獨則是組合焦距舀

4k

11 = d

9

顯微鏡

12A 8 x 2

鏡之焦距為4煙

葡長為20糖

燭光数

10. 自凸透鏡两個

作

望遠鏡