經濟及公共事務科 (五) 劉奇敏。
育教僑華 頁三張四第 日九十月十年申
CITY HALKIU YAT PO
報日僑華 日期星
日八月二十年八六九一曆公年七十五國民華中
一九六九五中文中学会考試預習
練
兼獲羅的伸縮胞有
生物科
育敎僑華
莫愛桐:
單覆蟲營養么,
草履蟲絲胞的功用!
容納食物粗心
收集排物)
(接第四張第二頁)
借動物性營養法,搶奪式,以單細胞藻類細 菊或細小的原生動物作食物莫营否過程如下,
*單優惠於食物胞內的食物漢淳於細胞那一部位
文中學會考試題預習
攝食:以口清纖毛的擺動,促成水流,食物籍水(露. 流進入口溝,再冲入胞口,再由胞咽的纖毛把食 物带至胞咽盡頭形成食物胞於细胞質内 .消化食物胞形成後便脱離炮咽,首先向後,继 ・前作曲線移動、在移動時康生質ら酵素
食物胞的把食物分解此種消化法屬细胞的消化 吸収に原生吸放食物胞内己消化主食物 人同化:吸入已消化之食物後組成新的原主望!
排遣,不能消化工殘渣當食物胞向後移動至胞 肛點時便排出細胞外(圖一)
草履蟲呼吸法:
華霧原生の進於水中山義氣皮原質 呼出二氧化碳至水中都是利用擴散作用直接經 皮腰進行
帶少許細胞覺!!
車獲猋進行二分体生殖将核之行為是,
·火橫行有絲分裂
大核消失
草履蟲的無性生殖屬於
泡手形绣
植物性
草履蟲的大核的功用是
单位森森体行媒合生殖撲可產生若干個涵体
個
莫動植物性的
老司排气功能
一個二
草疫蟲的運動屬於細胞速動中心
熱變形運動
川流運動
草覆蟲的接合生殖彼此走至對方細胞之物質是
勤核並可能連
三草履蟲排洩法:
氧氣進至原生質的,氧化其内之体質產生热 能供生活用(图二)
呼吸結果所產生之氮廢物和碳廢物,有部分可
(周三) 難壙散作用經皮膜排出男一部分物は主要 為(廢物)及過多之水分则由輻射管收集,我 至伸縮胞然後伸縮胞移近皮膜, 開一臨時 小儿把廢物排出细胞外,
伸縮胞除了可收集廢物外,其主要功能還是收 集過多之水分調節原生質一定濃度,產生正常之: 渗透壓、因单履蟲不時有水分從皮膜和胞啦? 入细胞内,故細胞的水分會遇多伸縮胞即負 貴抽取過多水分之工作,因此伸縮胞可稍為療 透調節器(明三)
榮履蟲運動法
屬纖毛運動,由於細胞內有威動纖維的聯絡優異 纖毛有規律的擺動,因而有行動現象,又因口潸鐵毛 的関係草轟轟前進時本自治憂軸台韓同時前進路 線是螺旋形(圖四)
五草履蟲的感應,
单位器的威應亦較不放,故可作出很当特別反應上
前進時遇到障碍物:薈立刻倒退少許改換另一方向
再前行,如此重望此動作至行通為止此箱嘗試錯誤(週五)
當遇到刺激,感應到有敵人時,絲胞會放出
有質的物質可抵紫敵人
·此外薄應燕喜集中在負電極,弱酸及?
此種種反應可知車渡在有良好之我應
草覆蟲的生殖法
無性生殖,屬横二公缕生殖
盛心
在環境優良時(浪路置 搜乐细胞中段漸漸 最後细胞中技橫製成之一 當溫度適宜時)小核置光收縮,庾有跑咽消失 細胞子細胞漸漸長出其 約一次消分裂 大枝規部分配合の大桜一 行無絲分裂
1. 高等動物進行有性生殖精卵子結合成合子令子再分裂,次,產生活于储调体、
一個口
單細胞動物之伸縮胞除收集排洩物外還有一种重要的功能是
收集体内通多之水分容内食物粒
·收集食物渣滓
形蟲的孢子形成生殖对本身之好處為
黶刑週刺激が起眥田刺激の移動此稱
嘗試錯誤反應
成正反應
變形蟲的孢子形成生種發生於
*環境優良,上環境与一
.下列為變形蟲和草履蟲的細胞,填-
標線所指各部名稱
小校從此分裂硬告完成上
麤体分離各台獨立生活!
有性生殖屬提合生殖
填光下表比較变形燕、草履蟲各項
变形蟲
草夜蟲經多次無性分裂後,美個体便產生生活衰退現象個体 漸漸を小識も求稀少分裂生殖能力減少此時便要舉行
一次摸合生殖,以恢復其生活能力。
攝食法
排道
伸縮胞
最外層
大楼
首先二数体相遇口清相接
餘下之機再分裂一次形成一大而不
大校澌漸稚解小核分裂子移動的定核(雌栈)一小可移動的動 美田核,其中三核消失,餘 核(雄核),動核經口清相提部分的原
*生墮橋而移至對細胞內。奥對方的 定核結合成一合核此邊程稳堂精 後二壘体便分開
運動 感應
合校分裂三次,成八核,其中有四分裂後成品新個体,各具二大核,一小枝
偏置大核,四個竞小孩、
最後每個体之小核爵分裂一次,同時
細胞亦横分裂一次,每新個体臭有
小校,小核再分裂一次,同時蟲 作不横分裂一次。
【小核中薄有三個消餘下大核和一小核,故二個接合共生
前期練習解答
填-
,新胃藥水綿恆球藻、矽藻
*酵母菌,結核桿菌; 肺炎雙球菌;因驿熟螺提萄
3.蕈菌對巴西首黴,木耳
4.川流運動量形運動, 载毛運動; 收縮運動
5擴散作用渗透作用,滞性吸附性表面强力小郎運動
6、有絲分裂、無絲分裂,减数分裂
£ff. la, 36, 34; te, sa, 6b, 7.b; rb
(山)澉粉拉缸細胞核(岑肥的绿体细胞壁的膠質期
00
4 contract is signed between the bank and the wholesaler should both mutually agree to the terms specified above. What the bank does next is merely instruct its correspondent bank of the country of the manufacturer. The correspondent bank whereupon. Bends a Letter of Credit to the manufacturer, who begins production of the goods. This Letter of Credit ensures that the manufacturer has a legal right to claim the money upon delivery of the goods to the wholesalers
when the goods have been produced the manufacturer delivers the goods to the shipping agent; who issues a document to certify that the goods have been Icaded on board a ship. This document is known as a Bill of Lading. This, together with the Letter of Credit, is produced by the manufacturer to claim the money from the correspondent bank, a copy of the bill of Lading is dispatched to the bank of the wholesaler, who on paying the balance, can use the Bill of: lading to claim the goods when the ship calls at the port. However, if the wholesaler happens to be unable to pay the balance, then the bank has the right to seize the goods and have the good". auctioned
It can be seen here that the hank owesthe correspondent bank the aum that the latter has para to the manufacturer. At-a Later date, however, the correspondent bank may instruct the bank to pay a wa to a certain person or firm in the country of the bank and in this way they can settle their accounts:with convenience. Between the two banks they have therefore
established this system of financing the orders of "importers with minimum hindrance. Trade with foreign
countries has been simplified and facilitated through the existence of this service of a bank,
uestion (2): Explain the advantages and disadvantages)
of using cheques and legal tender.
Answer
Legal tender and cheques are the two forme of money most widely used in the country today, and between them they share a number of advantages as well, as disadvantages under different circumstances, Magda legal tender does not present any question or doubt when used as a medium of exchange, it las popularly used by the majority when small sums of money are involved. It would, of course, bé unthinkable If a person were to take out his cheque book to write archeque. payable to the Kowloan Motor Bus Co., Limited for the sum of cents ten only sach time he took a ride on the bus. And equally unthinkable would be it. the KMB were to bring the cheque all the way from Kowloon to the Central District to draw out ten cents, In fact, the coat of going across the harbour would exceed that Hum not to mention: that much time and effort would be wasted at the same time.
On the other hand, it would also be unthinkable If we were to bring two cumbers one bags of coins and dollar-notes when going to purchase an automobile.do you know how long it will take to count the dollar- notes and coins before reaching forty thousand dollars?:
It must also be remembered that Jegal sander does not provide any safety or protection against loss or theft, It is therefore very risky to keep one's money in legal tender at home especially in large sums, Cheques are safe to keep at home, except when they get into the hands of forgers. But forging cheques is less common than theft. of cash..
At one time bearer cheques were risky (although it may still be true to some extent today) becauDÉ anybody could withdraw the: money without any
difficulty, but today, most banks raquire endorsements at the back of each cheque, whether the chequesvara bearer or order cheques, When cheques are crossed thay. dàn, never be exchanged for cash right away, aince the sum of money has to be deposited in the payee's own personal Account before he can draw the money out using his own cheque. Thus, crossed cheques can be sent by post without any possibility of their being atolen, The chly inconvenience, if that can also be called a drawback, is that if a holder of a crossed cheque does not have a current account in a bank he bas to give the cheque to someone who has, and this will take some time before he can obtain the cash. * Cheques are therefore used when large sums of
money are involved, and they are also convenient to carry around, However, they are inconvenient when small suns are heed. It must also be remembered that cheques are not accepted by law in payment of a debt, 'ma is true of legal tender; cheques are accepted only
when the payess express their willingness to accept thom, We do not under normal circumstances walk into a department store, buy some articles and rite out = cheque in payment for the articles. If the shopkeeper knows "us well, he may accept our
cheques, the reason
being:
the cheques may be dishonoured by the bank,
tender, as a means of deferred payment. This, however i is only true when the payas agrees to accept a postdated cheque - that is, are bearing a future. date and therefore cannot be a
o however, are mora useful than legal:
nged for cash until the data arrives. Unless we are quite certain to hav a sum of money at a future time, we should not postda te our cheques »
Akarcise No:
Why do you think the Bank Ordinance 1984 is vitally important to our banking system?
2. How does a bank create, credit?
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