賀四第張五第 日二十月正年西巴靨雙 WAH KTU YAT
文學會考試題預習
生物科
(十七)
BIOLOGY (17)
Answer to the questions of last week
12.; (2) State, in a table farm, the similarities and
differences between the life-history of a frog and that of 4 mosquito,
Ans
(b) Kame the food for each of the following insects
when it is (1) a larva and, (11) an a?-
(4) butterfly, (8) Female mosquito, (C) Housefly, (D) Queen bàs.
(a) The following table is a comparison of the lare-
histories of a frog and a mosšouító.
Mosquito
Stages
Bigg
Cigar-shaped. Leid
in rafts floating
Larva
Pupa
(b)
Insects
KA).
Butterfly
|(B) Female
mosquito
Housefly.
Quesn
Its body is divided into head,
thorax and abdomen. It possesses a siphon for
breathing.
It moults' 4 times. The pupa possesses respiratory trumpets for breathing and support.
An adult emerges from the pupă case. The male dies off in Autumn while the female hibernates. Adults live in air and land
Larva
Feeds-on leaves and its egg shell.
Feeds on minute organisms in water.
Feeds on the semi- Liquid decomposing organic substances
Feeds on bee milk or royal jelly.
Frog
Round or oULL-
shaped, laid in water, The egg
surrounded by Jelly
like coat to make it floats,
Tadpole is formed. It breathes by mana
of sucker. Lätter the external gilla used for breathing, About 3-5 weeks after hatening, it breathes by means of internal gills. At last, lungs develop and serva
as a breathing organ,
Limba developing stage.
The adult is: amphibious, 110, it lives both fi water and on Land,
Adult
Feeds on plant juice and nectar.
Sucks blood from animal bodies,
Feeds on the decayed rubbish, faeces, rotten meat and various foods.
Feeds on honey and Nectar
(a) lake à clear, fully labelled sectional diagram
to show the structure of a mammalian eye,
(b) State the functions of the various parts of
the eye.
(c) Give clear simple diagram to show how the
defects of short sight and long eight can corrected.
報日僑華
五期星日八十月二年九六九一屣公年八十五國民垫中育教僑華
(痰第五張第一頁)
(vi) Ciliary body: to perform an abutment for the
insertion of the suspensory ligament. vil) Suspensory ligament to tighten the lens in
When it a fixed position of the eye,
一九六九丰中文中学会考試題預裝
物理科
(十六)
·鄧炳恩
contracts the lens flattens and the pupil dilates, when it relaxes the lens is more convex and the pupil constricts.
(viii) Aris: to increase or decrease the size of.
the pupil so as to control the intensity Light entering the eye.
(ix) lens: to control the degree of refraction of
light so producing an image on the retina by its power of contraction and relaxation. naturally and automatically.
(x) Aqueous humour to control the refraction
of light and lubricate the front part of the lens and cornea. It also contains mitrient for the eye,
(xi) Vitreous humour: to help focusing rays
light; to supply nutrient to eye and maintain the shape of the eye ball.. (xii) Sclerotic coat to protect the underlying
tissues and prevent incoming light via cornea and pupil from escaping..
xili) Choroid is a vascular and nutrient layer
containing black pigments to help in
reducing the reflection of light within the sys
(xiv) Retina: is sensitive to light and the image
is screened on it. Light and colours are discriminated by layers of cones and rod
(xv)Yellow spot: sharp and keen image is focused
here (xvi) Blind spot contains no light-sensitive
cells. So no impression is recorded in the brain.
xvii) Optic nerve to control the sensation of
the whole eye.
The short sight (myopia) is usually formed,
as in the case of the eye ball being too long.
The correction is to wear spectacles with suitable concave lenses which diverge the rays of light before entering the eye.
Light from distant object
Short Sight and Its Correction
Concave Lens
・Focus
Focus (Corrected) Uncorrected)
The long sight. (hypermetropis,
the refractive error in which the point of focus for rays of light from a near object is behind the retina of the eye. Therefore, the distant objects can be seen clearly, but near-objects cannot.
It is corrected, in adults, by wearing suitable convex lenses which will converge the light rays before entering the eye. The method of correction is shown by dotted lines in the diagram below:
Light from Near Object
Convex lens
Long Sight and Its Correction
Foctis (Uncorrected)
Focus
(Corrected)
= 1 +16395
86395
按二项式定理展闸求近似值
(1+ 86395) = 1 + 2 x 86395
1.000116
the ante 0.000 116.15
工弦及空氣柱之振動填-
題
1.鋼線長:
厘米以25千克壶之張力緊張 設此線2米長重479厄且設重力加速 度为98.1 厘米/秒,則此弦振動時其頻率約 为每秒一次
名弦線長:30厘米其質量為80克美頻率為
80次/秒則此法所受之張力為
3两绶量相同長度相等之弦線其一所受之 張
0 8 4 6ð þ - 6 9 35 1 st # 34 tk 20 2 58 # 之比為
4两質量相等長度相等之弦線其所受
張力 為1:3張力大者其橫截面積亦大設幼弦 所發墓昔之振数為粗弦之两倍则两孩之直 径之好海
533 27
厘米其第一泛音之 振数為每秒二 百次价受之跟力為4仟克至且毅重力加速 £ g $ 981 £ *P2, HALAHIL
6.設声音在水中之速度為1440秒一閉管
共振則陰長
文房一般長と管亦能興此者又共振則此管
風琴管長83厘米今吹入0°c之空氣則 此管音調三振数
8設以
127
9.某温度時 9/8倍則
熱風琴管使其温度由16°c升至 興絕對温度三平方根成正 奥原抵数比為
10.两風琴管一為閉管一為開管其所發之音調
相同,則两管長度之比為
10.
pupi Cornea
Iris
Conjunc tiva Aqueous Humour
Suspensory Ligament
"Lens
Sclerotic Coat
-choroid
-Yellow spot
Vitreous Humour
Ciliary Body
Ciliary Muscles
Optic Nerve Blind Spot
Retina
A Median Vertical Section Of Human Eye
(b) functions of the various parts of the eye are:
explained as follows:-
(1) Eyelid: to protect the front part of the
eye ball which is in the orbital socket of the skull.
(11) tyelash: to filter the dust and other sme LL
foreign bodies coming towards the eyeball. 111) Conjunctiv: to protect the delicate.
membrane of the cornea
(iv) Gornea: to help the refraction of light, (7) Fupili is an opening to limit the light
rays that pass through.
Questions for this week
On the line at the right of each statement, place - the number preceding the word or expression that
best completes the statement.
1. A plant hormone that stimulates growth of plants is (1) cortisone (2) insulin (3) auxin (4) toxir (5) pepsin
I
2. Vitamin D in the diet prevents (1) hemophilia
(2) pellagra (3) rickets (4) scurvy (5) sterility
The eggs of a frog are formed in the (1) ovary (2) oviduct (3) sperm duct (4) testes. (5) uterus,
The condition known as cretinim results from a lack of (1) calcium (2) thyroxin (3) vitamin
(4) vitamin A (5) adrenaline.
The placenta is an important structure in the reproduction of (1) amphibians (2) birds (3) reptiles (4) mammals (5) insects. 5. The egg of a fish is larger than the sperm because the egg contains (1) yolk (2) jelly coat (3) embrya (4) nucleus (5) oil.
6.
A disease transmitted by mosquitoes is (1) rheumatic fever (2) typhoid fever. (3) typhus fever (4) yellow fever (5) diphtheria.
č. Cockroaches run away from a bright light. This
behavior is an example of negative (1) chemotropism (2) geotropism (3) hydrotropism. (4) phototropism (5) thermona sty.
8. Anemia may be prevented by including in the diet adequate amounts of (1) calcium (2) iron [G] Vitamin A (4) Vitamin K (5) Vitamin D,
If equal weights of the following substances
are oxidized in the body, the largest number of calories is produced by (1) carbohydrates
(2) rats (3) proteins (4) Vitamins (5) sugars.
11. nydrotropism is a response to (1) gravity (2) heat】
(3) light (4) chemical (5) moisture 12. A cold-blooded animal with lungs and a scaly
skin is (1) an amphibian (2) a bird (3) a mammal (4) a reptile (5), a fish.
12.
13 The smallest feathers on a bird's body are the
(1) down feathers (2) quill feathers (3) contour feathers (4) coverts (5) filoplumes. 13% which item does not belong to the group? (1) Housefly (2) termite (3) Honey bee (4) Scorpion (5) rasshopper
140
15. A fish detects vibrations in the water by means of its (1) fins (2) lateral lines (3) eyes. (4) swin-bladder (5) gills.
-15
The disease called beri-beri is due to (1) insufficient secretion of bile (2) excess secretion of gastric juice (3) absence of proteins in the diet (4) absence of Vitamin E in the diet (5) absence of Vitamin By in the diet.
17. Which food substance helps to prevent night-
blindness and other eye diseases?
(1) proteins (2) Vitamin A (3) Vitamin B (4) Vitamin C (5) Fats
17
16. Choose the item which is the least useful in
helping plants to disperse their seeds or fruits. (1) Human beings (2) Birds (3) Insects (4) water (5) wind.
18.
[19. Mineral salts in the soil can only be absorbeg by
root-hairs if they (1) contain nitrogen
(2) are dissolved in water (3) are insoluble in water (4) are mixed with lime (5) are decomposed
19. into other elements. Locomotion in tadpoles is mainly brought about by (1) muscular tail (2) Legs (3) external gilla (4) sucker (5) fins..
20
(a) With the aid of a fully labelled diagram,
describe clearly, the structure of the ear of a Named mammal
(b) Part of the ear is concerned with the functio
of balance of the body. Describe fully this part of the car and show how does it work?{"
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