1971-11-11 — Page 14

郭d僑華

四期星 日一十月一十年一七九一番公年十六國民華中古教信藥

「莫二張四第日四廿月九年愛辛庭宴 WAH KIU YAT PO

1912英文中學會考試題預習專欄:

堅道英文書院主編

生物科

Pick out the correct Answers from the following Mul Choice Questions 208VOTS given at the end.

(1) Jassous exchange in fish takes place in the )

operculum

swim bladder:

gill filsas NA

gill Blit

south

fore-

QUESTION",

BIOLOGY (2)-

HOW ARE THE VARIOUS STAGES IN THE LIFE CYCLE

OF A FROG ADAPTED TO THEIR RESPECTIVE SURROUNDINOS7

LAN FOR THE ANSWER 19

Introduction brief

Briefly describe life cycle.

Diagramatic life cycle.

Adaptations of eggs, tadpole and adult" frog

respectively this is the bain body of the

andyer

5. Conclusion — brinf."

ANSWER T

The frog 1: an ampli bi an which can live pota on land and in water.ee.

During reproductive season the eggs Of The ITOR are laid in stagnant fresh water such as the pond wheдà external fertilization takes place. The embryo develor

in the water and is surrounded by a jelly coat. Later it changes intè a free-swimming larva or tadpole Through metamorphosis the tadpole in converted int the adult frog

hindlim)

särdrum

dorsal aid

Adult fros

veutralṣṇida

The function or the lateral line in fish.

sensory function

rospiratior

afcretion

balance

emelling

The tapeworm gate into the human body tha

drinking contaminated water

sating contaminated food eating hexacanth sabuyos

eating undercooked pozy sating vegetables.

(4) The bladder worm is also known

(1)

D)

hexaoanth embryo

hooked worm

oyaticerous

Jarve

When tadpole is hatched it first takes food from the

Jolly 906

water

солт

remainder of the yoli

microscopic aquatio organisma

Which of the following is not a

a frog

It podsestes a fiótitating mombráNG

B) It possessed ear drum

It has moist and slimy skin

It has teath on both java.

(*) It possesses a pair of prominent ayes

Which of the following is not the structure of

Hydra

bypostoma

Tadpole-vent

B

enteron

nogogies:

initio Life 07014 05. Frog.

The three main stages in the life oycle of the frog are the 488 (or embryc) tadpole and adult frog.

The *g* which develop in which are in a group ind are Äurrounded by jelly cost. This cont: ia parna- able and allows the exchange of gases, with the surrounde Ing water thus helps in the breathing process TKOS Jelly also protects the eggs from being aaten up by ensaies under water becasue it is distastful. The upper dorsal side of the eggs in dark while the lower (ventral) side in white. Thịa provides protective colouration,N The dorsal side bionds with the dark bottom of the ponu when viewed from "above, and the ventral side merges, to the light background above, and thus will escaps thị sttention of their annionitis

The tadpole slao has an aquavio surrounding where vatar veads can be found. Its south parts are equipped- with horny jawa adapted to cut water weeds which are iti chief source of food. The intestine is long and soiled. * adapted for vegetable food, baqësus digestion d£ vagat-.

ble takes longer time as compared with tissa. PORARYSCs gilla too' as: the fish, adapted to breathe under water. In its early stage it bears external gilis which are later on replaced by internal gills. It has a strong muscular tail bearing fins adapted to locomote or swis through water. Ita streamline and slippery body helps to reduce friction during swimming. The dark brown or black colour of the tadplos also provides protective colouration. The ventral sucker helps to attach the body to the support as the water weed,

The adult frog lives both on Land and in water. Ja land, it is adapted to absorb oxygen in the air by

ms of the moist skin, two lungs and lining of the uth cavity. It supports its own body on land by sane of the four limbs. The strong muscular hindlima help to locomote or jump on solid ground. The mouth perta are suited to feed on land too. Unlike the tadpole, it takes in flesh instead of vegetable. The sticky extensible tongue helps to capture insects and worna, while its teeth on the upper jaw can prevent the escape of the prey. The intestine is shorter in proportion for digestion of flesh. The frog is able change the shading of its skin so as to suit to back- grounds of varying degrese of darkness, The eardrum byspanum is adapted to hearing on land toor

Under water the frog can swim efficiently becasue. of its stresa-line body and webbed feet. The slipperv skin «lso reduces the friction. The moist skin is adapted for breathing under water, and water is prevenm ted from entering the mouth and lungs by closing of

The frog passes through the cold winter by enter- ng into a resting stage or hibernation in the soil, otherwise it might have been killed by such low temper- ature. During hibernation it relies solely on the food storage inside its body to maintain its life.

As we can see from above the various stagan in the Life cycle of the frog are fully adapted to their respective surroundings

sotoplasm

1. tentacles.

the colla that are mainly responsible for regener, ation in Hydra ia

nerve cells"

lenatoblast.

gland cells

interstitial cell.

susculo-epithelial cell

9) be digestion of Hydra is

Intracellulat

B) Extracellular.

Intercellular

Intracellular and extracellular

none of the above

(10) Amoeba reproduces under favourable condition

conjugation

(A)

(B)

binary fission.

(C)

budding

(D)

spora formation.

fertilisation

(11) the main function of the contractile vacuole

Imoeba is

for excretion

for digestion ⠀

for removal of undigested food to pump water into the body

to regulate water content in the cell:

moregulation

hich part of the cell is composed of iving materilae?

ell membran

hloroplast

nucleus

Vacuole membrane Dell wall

hester19 IWM.

known

queen'

drone.

grub Larva

14) The Larva di Mousefly is knowi

aterpilla maggot wriggle.

nymph

grub

Which of the following exhibit incomplete metamorphosis.

cabbage white butterfly

sockroach:

housefly

Ka

|院生產黃花;优主持

EPIC

·慶祝銀 紀念

18 UISITAKE

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BABSEN RENATZEVEDOEN HEE THE-EKERAARAVITSEE - ER

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(凡期六)下午二時半,在翻合院一〇六 (ES) SXKSE-5 題為「香港地方政制改革」

[英政府才面的人生並設有匯加,會對此表

E-EECE A MEA HEXEKESEK24

中大學生會週末舉行 公開性座談會

1972

中文中學會考試題預習專欄 O

解

数學科

第一次預習題解答 柳下列請式之因式

x2+x2+}

(x2+ 1)2 = x2 (x2+1+x)(x+1-X)

• (x2+x+1)(x2-X+1)

a + 4a2+16

(+) a2 + 4a2 +16

'+802+16-40

(a2+4)-(2a)?

張正弗 (二)

4x-3x-1.

(解)用綜合除法

4+0-3-1

+4+4+1 444+1+0

4+2+0 4x3-3x-1

(X−1)(x+2)(4x+2)||

(X−1)(2x+1)(2X+1)

(x−1)(2x+1)2.

9. x+64

(a2+4+2a)(Q2+4-20) AZ) MGCA 2

-(a2+za+4)(Q2-2a+4)

X4+64

x2+16x2+64-1627-

x2+4x2+10x+12x+9= (x2+8)2 ·(4x)

(74) X^+4x2 +10x2+12x+9 =(x2+8+4x)(x2-4.8—4x) -

(24+4x2 +4x2)+(67.

+122)+9 (x2+2x)2+6(x+2x)

= (x2+2x+3)2

4 x+20x +96

A) X2420x +96 =(x+BXXX+12)

(x2+4X+8)2=4x+8)

10 x2-4x+s (解)用綜合除法

-3

| +1 −3 +0 x2-4x+3 =(x−1)(X2+X−3)

5 AbX +(a+b)x+ab ==

a2 abx2+(a2+b2)x +ab

(ax+b){ bx+a)

+6x= (ac-b">x-bc

(鮮)

+6

-ac+b2=~(ac-b3)

abx (ac-b2)x−bC (ax+b)(6x-C)

7: x2+2x8-882+2x+147-3 (94) x2+2xy -8y?. =(X+44)(x−24)

•·B x2+2x8-842+2x+148 ~3~(x+4y+1)(x−28+m) 4x2+2X4-842+2x+144-3

=x2+2x4-842+(l+m)X

+(4 m −28) Y + I'm.

FP l+m=2

-28+4m=14

Im (0) (2),(3) 19

m=3

(2)

EX x2+2x8-8y2+2x+148-3 (X+44-1)(X-2y+3)

(例)試證

| Sec A+ CsC_A = tan A+

Cot A

(5)/sec2A+ CIC2 A

=/ Jan A+ 1+ Cot A+I

·√tan A +2 + Cot?A

tan A+ 2 lan A Cot A+ Cot2Ð

(tan A+ CotA)2

tanA + Cot A

第二次預習题

試證下列各恆等式.

SinI+Sun X Tan X= tanx

3.

sec A-sec A= tan At

tan A

COCA

CAC-A.

+ CACA-!· CACATI

2 sec2A

Cos A + Si A=

3 Si?A Coo?A

(Aim A+ Cos A) (cot A + tan A) = SecA+ COCA 6. Sin A(it dan A) +

CosA(1+ cot A) == SecA+

cách

•Sun A COCA + CO A URCA - SmAt CoA.

(1-tan0) + ((~~ Co(O)*

= ( seca - coco)?

Jane - CAZZO

Estane

nosquito

honey hea