1980-06-13 — Page 24

真四第張六第日一初月五年申庚曆夏 WAH KIU YATPO

2

單出版社

Havision Exercise for Junior Forms

R

初中課程綜合練習

THORN PP.

雄風社生

生物科建議參考資料

明德出版社提供

(a) (1) A stomach.

(ii) B - duodenum

pancreas

small intestine/ ileum

(b)

1) C

D

E

caecum

Erectum

(i) Protein is digested in A. (1) E for the digestion of

cellulose

Ffor the absorption of

water

(iv) There will be an

digestion of

Ote, protein and. and lipid since no

digestive enzymes Trom the pancreas is

produced.

blood capillaries Hlacteal

(i) The thin epithelium

allows a short diffusion distance, the presence. of blood capillaries and lacteal allows a steep diffusion gradient, and the the folded surface provides an increased surface for absorption.

(ii) Glucose and amino acids

enter G.

-(iv) Fatty acids, glycerol.

and oil droplets enter H. (v) The digested food passes-

along the hepatic portal vein, the liver, the hepatic vein, the posterior vena cava, and then enters the heart.

(c) (i)

Dodder obtains its food from the host plant and therefore benefits from

the association with the host. The host suffers some harm from this association.

(ii) 1. Haustoria is present.

2. Chlorophyll is absent.

in the scale leaves.

Roots are absent at

the mature stage, It develops at a

later time than the

host.

而且有强的抗黏與抗谔否能力。

(a)(i)

(ii) The level of blood

glucose rises and show's a peak at the end of the first 1⁄2 hour. The rise is due to the absorption of glucose from the alimentary canal to the blood stream. Thereafter, the glucose lovel falls back to normal at the end of 1. hour. It is because the high glucose level Stimulates the secretion of insulin which promotes the conversion of glucose to glycogen. After 1 hour, the glucose level remains relatively constant by means of homeostasis.

(ii) It is oxidized to yield

energy or converted to. glycogen for storage in liver and muscle.

(iv) The peak of the curve of

Qis higher and is.

recorded at a later time than that of P. The glucose level of Q remains high and does not fall back to normal 14 hours after the peak, while that of P falls

back 1 hour after the

peak. It is because Q may have an abnormal metabolism of glucose, perhaps an insufficient insulin secretion, (v) Some of the glucose is.

oxidized and some is lost through the excretion in kidneys.

(vi) Diabetes...

(b) (1) Predator-prey.

relationship.

A is prey and B is predator. (ii) There is an increase in

the number of B and therefore more A is killed.

(ii) Since B occupies a

正B所有食物,但由视患者的血液,分析其布「如果某人的血糖低

耐,候都可以各樾不同的數

水泥玻璃瓦片 。然後,當胰臟所分滅。它可能反而會引起低血

薛吾在血液中。飯後,爲,這項檢驗共不能明糖低的現象是否粱產生

起點不嘗

低症能生

血,明認

硏

英國一家製造商推出「抵導供平垦項式工業「低血糖症是人類對經紀錄蛋器。

·道緻以天然灰色水泥製成的瓦片,在設計上「如果你上了一段階搵

RISANONE SEUSEBKE THE ORANGERIEN ERZAKKATH

,會觀生有危險性的圍埃,它又不會吸收水份,,不能適還張取金的,因。一氏重新設計的挑選用上後就決 猫孕斑。此鐵橋老松,一氣設備和減低了異主要,用一批形式特別的些 機械元杵有關的爚音,片,把空氧以放射及融

JERE I#SUBAR

·到走動,也不會佃臺頂受根述。瓦面又有一防

|300毫米平方 1108米,重兩公斤。較大尺寸珠在正常的餐後或造歡作進行。該重型貨車從才轉動,因此低

·永歷平等手的特殊迷 · 目前的標筇尺寸爲力檢啻感廢棄,而改究所主持的研究學院在引擎特洌熱的時候凤 视生產這種瓦片是採用一種包括了皮豪·吸納迪生鄭齦寫:葡萄掂財車製造商和潇典研越緻度的恒温器,只有 病。一共他一樣,啊,研製工作由致間 上一個紀錄引

的瓦片不久亦合面世。

守篇

力

生在我

正颥

再常權

來的

米從合研

「發生時再來量荷糖止至開的七點五米管和料成本。

因的器個

此時起

減悷只錄

低您有列

higher trophic level than

往進】

份行

報日僑華

(1)

(ii).

there is wastage

When energy is

五期星

transferred from A to B.

Therefore a large

number of A must be

present in order to

support B.

The size of population B keeps on decreasing because of starvation. The population size of A begins to increase. The size of population A keeps on increasing.

1. Place the apparatus

under normal conditions for

period.

Introduce an air bubble in the capillary tube.

Record the rate of moverment of the air bubble several times. Place the apparatus near a fan and repeat the procedure as above.

Compare the rates

recorded.

Under high relative humidity, the rate of transpiration decreases since evaporation of water

in the mesophyll is hindered and the diffusion of water vapour out from the leaves is slowed down. by the less steep diffusion gradient. Under high intensity of sunlight, the rate of of transpiration

increases since. Sunlight causes a larger size of the stomatal pores and therefore more water vapour to diffuse out of the leaves.

(1) Transpiration pull,

capillary force and root pressure.

(iv) Xylem. For the support

of plant.

(b) (1) Rice.

(i) It is because per unit of

weight fat yield more energy than any other food. This makes fat a good food for Eskimo who requires more energy to compensate the greater loss of heat to the cold surroundings.

(iii) Carbohydrate is readily.

oxidized to provide

energy while protein

is needed for growth and repair.

低

不

良現

影象

响

受

而急

洗科

日三十月六年〇八九一曆公年九十六國民華中刊酒學科育教

(iv) Minerals, vitamins and.

water..

(v) 2630-(60x4)-(30x9): 540 (g)

(a) (1)

B-Bowman's capsule F collecting duct (11) Region B. (i) Blood cells and blood

proteins are present in A but not in B. (iv) Reaborption of water. (v) The volume decreases

while the concentration increases. It is because

higher osmotic pressure of blood in A will cause a greater retention of water in blood so that less water can pass to B. (vi) It is because glucose is

reabsorbed along the Convulated tubule from B to C and returns to the blood capillaries.

(vii) As the fluid passes from

(b) (i)

B to F, a large amount of water is reabsorbed. Since only some salts and no urea are reabsorbed, there is an. increase in percentages of urea and salts.

tympanum.

ear ossicles semicircular canals auditory nerve- cochlea Eustachian tube (1) A converts sound

F

vibrations to mechanical vibrations.

B transmit and amplify the vibrations.

D transmits nerve impulses generated in C and E to the brain. E converts vibrations to nerve impulses. (iii) No.

(iv) The change of

atmospheric pressure causes an unbalanced. pressure on the two sides of the tympanum. This affects the functioning of the tympanum and causes a temporary "deafness". Blowing the nose or swallowing opens the Eustachian tube and allows the middle ear to connect with the external environment, thus a balance of pressure the two sides of the

tympanum can be restored.

人份的

解析能

检需求,尤其是對那些

·有些醫生於迎會這

KARVERESTE

一獎的狀線。」

家的

(v) C is important to the balance of body.

(a) (i)

5% sucrose solution (11) 20% sucrose solution (i) 15% sucrose solution (iv) In the stem the thin

walled cortical cells are being pressed together by the thick walled epidermal cells. When a strip is freshly cut, the release of tension. causes the cortical cells to expand and curve over the epidermal layer.

(v) Since 5% sucrose.

solution is lower in concentration than the cell sap, water enters the epidermal cells and cortical cells by osmosis. Since the dell wall of the cortical cells is thinner than that of epidermal cells, the cortical cells are able to take in more water. Therefore the strip curves outwards,

On the other hand, 20% sucrose solution is higher in concentration than the cell sap, water leaves the cortical cells and epidermal cells by osmosis. More water is lost from the cortical cells than the epidermal cells, therefore the strip curves inwards. (vi) The effect of water.

evaporation on the strip. curvature can be avoided

(b) (i)

A

B

absorption lightning

denitrification

decomposition

(ii) Bacteria and fungi. (iii) The decompostion of

excretory products and dead remains will be ceased. Since nitrogen cannot be released to the soil to form nitrates, the plant will have a lack of nitrogen to manufacture proteins and the refore poor growth or even death will be resulted. The leguminous plants will be affected in a lesser extent since the nitrogen-fixing bacteria. In their nodules can fix atmospheric nitrogen and and provide nitrates to the plants.

科

19