1983-12-15 — Page 36

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頁四第張九第日二十月一十年度癸服夏 WAH KIU YAT PO

1984

中學會考試題預習專欄

生物 (十三)

明德出版社梁偉宏 提供資料

BIOLOGY (13)

W.W. LEUNG

|MILL & DALE PRESS LTD.

Unit 6.

The following diagram shows a developing Cembryo inside a

uterus.

maternal blood vessel

Perpetuation of

fluid

the opecies

13. The following diagram

shows the female.

urino-genital system.

Name

and F.

Which are the

atructures of the urinary sy

c) (1)Give two functions.

of Bo

(2)ewhich f

structure in

man is equivalent to structure B?

d) what happens to the

thickness of the wai1 of C after ovulation

(1)when fertilization

of egg does not occurs and (2)when the egg ia

fertilized?

Give 2 functions of

after fertilization,

At which structure.

does the fertilization

of egg occur?

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For vagina

b) Structure D and E.

c) (1)It produces eggs.

Tt produces female

·sex hormones which control the

development of

secondary sexual characters.

(2)Testin

decreases.

(1)The thickness

Vembryonic

blood"

(2)The thickness

Nessel

uterus

L)Neme X. (2)Which group of

vertebrate.

possesses structure

b) Give two structural: adaptations found in the membrane

separating the maternal blood and "embryonic blood.

Explain: the:

significance of these adaptations.

c)(1)Name 2 substances.

which pass from the embryonic blood to the maternal blood. (2)Name the process by which substances. pass through X.

Why is it significant for the blood systems of the mother and the embryo to be separated?

e) Give the function of the uterus during. birth..

f) Give the function of

fluid Y during birth.

Answers:

3.a

A:oviduct

B: ovary:

Cuterus.

H 43129

: bladder

urethra.

鮮裝

increases.

It provides a place where the fertilized egg attaches to and develops into foetus. It forms a part of. placenta througu which the embryo can obtain | oxygen and nutrien尢日 and gives out.

metabolic waste

f) A (oviduet).

a) (1)Placenta.

(2)Mammal.

b) 1. The membrane is

thin. This allows the substances to pass through easily.

The membrane show's

flodings, This increases the surface area for material exchanges.

(1)Carbon dioxide and

urea.

(2)Diffusion.

四期星

日五十月二十年三八九一座公年二十七國民善中育教輩

embryonic blood to initiate unwanted reactions (e.g.

coagulation of blood)。

It contracts

rhythmically to force

the foetus out..

It serves as a

lubricant during

birth

物理

(十三)

|明德出版社盧雄國 提供資料

PHYSICS (15)

1. This prevents the damage of the: delicate embryonic blood vessels by the high blood pressure of the maternal blood.

This preventa unwanted substances. (eg. pathogena,

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blood proteins) in maternal blood from

entering the

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HAK. 10

MIUI & DALE PRESS LTD. 1. A copper calorimeter

of mass 1 kg contains 0.8 kg nt

0,5 kg of ice at 0°c are added to the water. (a) Fow mucli of the ice

will remain unmelted? (h) How much steam.at

10-217287

100C must then be: blown into the mixture to raise

the temperature to

heax fusion of

Tatent

ice 556000 Jkgr

specific heat capacity of coppe 420 JkgC specific heat capacity of water 4200) Jkg-12-1 specific latent heat of vaporisation of

Water

2268000 Ike1). (a) A brass scale in

correct at 15°C. A Jength measured hy the scale at 45°C ja Tound to. he

the

e correct length" (Coefficient of

linear expansion of brass

10%

What volume.

好我

mercury at 0°C

must be placed in a

[

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flask of völime: 50cm) at -0°C so

that it just fills

the flask at 100°c (Coefficient of. cubical expansion of mercury S 0.00018 c Coefficient of linear expansion of

(a) A flask marked

*1000 cm?!

is fuit of water a

·54°C.

(1) What is the

density of water at 54 C

(ii)Find 1

the mass

of: waterin the flask? (density of water

20c 1000 km 3

coefficient of linear

expansion of

glass=0.000008°C-

average coefficient of cubical expan sion o sion of water is 0.00050-1)

Figure 1shows a ray of light, incident or a 60o glass prism of refractive index 1.6, and is just totally reflected at the second face of the tiriam

Figure Calculate

(i) the angle c, (ii) the angle of

incidence

A bright object vas placed in different positions in front of a convex lens causing a real image to be formed, on a screen în each case. The object distance u and the

image distance v were

裝 修

個四字大

measure from the. lens and are recorded

in the table below.

Object distance

60 cm.

36-em 150cm

Image distance 15. cm 16 cm

18 en

20 em

A cm

30 en

Bcn

36 cm.

48. cm 60cm

(a) Using the fact that

the path of light is reversible, obtain the values of A, B, Claud-D

(b) Plot the graph of

linear magnification n against image distange v.

From your graphi, determine the Tocal: length of the lens.

54 Air in a pipe closed at one end and 1.25m laug is vibration with three nodes and three antinodes A tuning fork of unkown frequency is in resonance with the air column, The velocit綻 of sound in air is

530 ms

From the information. given, find the approximate frequency of the funing fork"

Do you expect the actual frequency of the turning fork. greater than or smaller than the approximate fren obtained in (a)? Ex lain briefly.

(c) that is the direction

of vibration of the air molecules?.

What are the

approxy imate distances from the open end of the tube to the points

along the air column where you would find air molecules with minimum vibrational energy?

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