頁二筅張六第 日八廿月正年戌庚愿夏 WAH KIU YAT PO
報日僑筆
(iv) Adult stagas
四期星日五月三年〇七九一曆公年九十五國民華中 育教僑華
10英文中學會考試題預習專欄
道英文書院主編
生物科
(十八)
BIOLOGY (18) ▼
Answer to the questions of last week
1. Multiple Cheion Exero1801–
Ans.
1. (E)
2. (D)
3. (E)
4. (E)
5. (c)
7. (E)
9. (c) 10.4(E)
II. (a) What do you understand by the "social life",
in the quinal kingdom? Illustrate your answer by referring to the hive-bee. (b) With the aid of fully labelled diagrams
describe the life-cycle of a hive-bes,
(a) The "social life" is described as human colony and thone, of some groups of insects such as anta, termitas and hive bess.
In the colony of the hive bee, the queen bes is unable to organize a colony or to survive. at all without worker bees. She appears in an established colony, and flies out of the hive with male boos in chase on the nuptial flight. After that the queen is fertilized and returns to the hive to begin producing eggs. Most of the egge develop into workers, and as, in other societies of some groupe of insects," they integrating mechanism assuring that all members will be fed is the appropriate food in the colony. The worker bee is a builder of honey- comb, In addition the worker receives nectar and pollon grain brought to the hive or carries debris and dead been out of the hive, taking them off some distance and dropping then. à certain number of waz-secreting bees guard the entrance of the hive, inspacting all inconers to be sure that they are bees of their colony.
⠀⠀ When the colony becomes large the nurse been set aside a few-nggu to be raised as now queens. When the ogga"
a pupate, the colony beging to split up. About half of the workers induce the old queen to leave, and they fly off with her to begin a new colony. The other half remains. When the first new queen energer, she may also be induced to leave with another group of workers if the colony becomes very large again. Either she ar the next new queen, however, remains as the now resident queen, As soon as one or the other is established the few other queens that may be hatching are destroyed.
Drone
QUEEN
Eggs
Young Tarva
worker
Mature larva
-Diagrams showing the life-history of hive bee
The life-cycle of a hive-bee (completa metamorphosis) s
(1) Egg stages
The egge are laid by the queen bas, and are laid one by one in the cells where they have been cared very carefully. AB in hatching, those laid in worker cells, develop into workers; in queen cells they develop into queens; while the unfertilized egge laid in drone calls become the drones, All eggs are hatched. within about three days.
(ii) Larval stage:
The larva of different types of besa is usually legless. A larva in its own cell is fed by the worker with the appropriate food. The larval stage
normally lasts for one wesk, during which the larva moults six times and then pupaten.
(iii) Penal etager
After about six times of moulting the larva is ready to pupate. Ita cell is then capped with wax by the workers. The pupal stage can last for 4 to 5 days. then the capping is broken down and the duago emerges.
The adult bees are classified into three types, namely the queen (fertile female), the worker (sterile female) ar the drone (sterile male). They are all winged" and are capable of flight, but differ in size.
III. (a) Make a list of eight named multicellular
organisms that you have found in any one named habit.
(b) Give a brief account of the life-histaries
and habits of one plant and one animal from your listi.
(a) Eight malticellular organisms found in fresh water pond are1
(1) Hydra%
(ii) Fond snails of the various forma
(iii) Fish *.g. sale.
(iv) Frogs in the various stages
(v) Spirogyra
(vi) Duckwaada
(vii) Water lilies
(viii) Canadian pond weede
(h) Spirogra:
* It is a multicellular plant found in
the fresh water ponds, ditches and low-running
streams.
Its life-history can be classified. into two types according to the conditions of the environment. The two types of reproduction in a spirogyra aret
(1) Avexual reproduction - When conditions are favourable; parts of the mature plant body become separated to give rise to new individuala without any obvious change in the protoplasm, The filamenta separate into two shorter lengths of young filaments, This reproductive method in known as fragmentation.
(11) Sexual reproduction – The reproduction
coours when conditione are unfavourable or by chance the two mature spirogyra filamenta arrange themselves parallel to each other. The cells of the two separated filamente link together by forming a conjugation tube. The contents of the two linked oalla shrink, the chloroplasta disappear, the cross walls are then dissolved, The content of one cell is moved to the other. cell by passing through the conjugation tube.
Then the two nuclei fuse togather. Fertilization is said to have taken place. As a result of fertilisation a zygospore is formed. The zygos pore, continues to develop as it is set free by Recaying the old cell walls of the filament. It
o regist u is a able to resist unfavourable conditions until it burete out of its outer wall to form new filament again by cell division. This typo of reproduction in spirogyra is known as conjugation.
Frog
It is a multicellular animal found in fresh waver poada, lakes, ditches or planted fields.
its life history can be described as the follows:
(i) Hating stage - In spring the adult male frog.
mounts on the back of a mature female frog, and is carried about by the female for a few "days in water.
(11) Fertilisation of eggs and development of
fertilised eggs - After mating, the female frog lays 1000 to 2000 eggs on the shallow pond botton. Then the male sheds sperms over them. When the fusion of a sperm and an egg starin, fertilization is said to take place. After that the fertilized egg forms an ambrys by cell division.
(iii) Embryonic stage - About 10 to 12 days after
fertilization a young embryo formed has a tail, a head and cement gland. The energy and raw materials for growth are supplied from the yolk of the egg, while the oxygen for respiration diffuses from pond water through the egg mombranes and the surface of the ambryo.
(iv) Larval stage - 2 to 3 days after hatching,
the tadpole is formed. Its tail begins to lengthem. The mouth and external gills start to function by inhaling the dissolved oxygen in water. The tadpole first feeds on the pondweede,
Two weeks after hatching, the opercula, of the tadpole grown out and the internal gille emerge,
One month after hatching, the formation or hind-limba first appeara and the tadpole inhales dissolved oxygen through the internal gills. The animal' gradually changes to a carnivorous diet.
Two months after hatching, lungs develop and the animal visits to the surface of the pond frequently
Three months after hatching, the animal caste its skin and the young frog is.. formed when ite tail is completely absorbed... (v) Adult stage - The young frog now leaves the
dult stage - The young froz now water and tries to live on land by inhaling free oxygen from the atmospheric air through its body skin and mucous membranes of the mouth and lunga. The young frog- finally feeds on worms, anails and flies, It attains its sexual maturity in the third year.
Questions for this week::
1. (a) Describe, giving fully labelled diagrams, the
life-history of a named sonquite.
(b) Stage the similarities and differences, between
the life-history of thia mosquite and that of
· frog.
2. Make a large labelled drawing to shew the outer feature of a typical bony fish. How is the fish adapted to its mode of life in respect of (a) locomotion, and (b) respiration?
學會考試題預習
數學科 ®
(十八)
喬竹强。
第十七次預習題解答
(1)P路等边三角形ABC元 BC边上一点,若BP=吉BC,求話
9APPAB
(E**) ABC IS TH="AT), BP={BC.
(CE) 9AT-7AB*
(E) BAM AHL BC, BI
BH=HCBC,
(等腰三角形底边上之高,必平分底边)
3.
· AH = AB-BH = BC (BC)=BC.
(畢氏定理,等量代換)
PH=0C=c=LOC(BA# BP=1BC)
**APHY, AH2= AF-PH®=AP - ZBC (BAX-D)
• AP-BC BC2 (¥* AH2)
AP BC2+ BC2 = 44 BC2 = 7 ac2
9 AP — 7 BC — 7AB. (#141)
Q.E.D.
(2)AB站0园之直径,延AB至T令 BT=0B;援由T
作此园之切线TP. 試証TP=AP
(Exe) BT=0B, TPWOEXPE§.
(*) TP=A?.
(b) 1.1% OP, Rl <OPT=stik/
(切奌半径,垂直於切线)
2.联ㄗB,則因0B=BT(已知)
3. PB BT(.4 h44** *=
顶奌等距離)
21=2T (等腰三角形底角相等)
21=4A (3+3 ¥*****÷BAA),
<T=LA (##)
7. TP=AP(三角形电对等角之边相等)
QED
(2) All TytBf rt. A ABP£rt.ATOP (R. H.S.) (3)設△ABC之要心笃H,又CD為其外接园之直径,
EAB, HD 互相平分 (ZAR) H., A ABC =
CD為ABC园之直径。 (求詆)AB,HD互相平分 (TEA) 1. JK DB, 4] <D8C=rt £
(半园园周角為直角)。
2. DB LBC (takti) 3. AHL BC.
【岳心為三角形三頂去找之交奌
4. AHIDB (同套直柊 第三直线之两线平行) 5. ATIT TE BHIDA (* 12 4).
6.ADBH笃平行四边形(两组对边各平行)
AB, HD互相平分(口对角线互相平分 Q.E.D.
(4) △ABC中,AM笃中线,AD為<BAC之分角线,由B作
AD #AD✯ F, ZAMKE, RE(4) MENIAC (b) EDII AB.
(2) ADF<BAC, BM=MC,
BFLAD.
(E) (a) MFILAC,
(4) EDIAB,
BEBI) 1.36E BEŽ ACIGÁ,
則困<BAF=<GAF (已知AD為分角线)
2. <BFA=<GFA=M4 (#AMIA,LIATA)
3. AF AF (+16)
4. St. ABAF=MAGAF (ASA)
5. BF=FG, AB=AG, (^==##}<*%£¥)
6. BM=MC (E*»)
7 MFI CG, By MEILAC
(三角形雨辺中真球,平行等三)
FP. 因題設 AD為<BAC之平分线
q
(a) $
∴=(ᅀ内角平分线,分讨论典两鄰成比例)
BD
DC-BD
AB
AC-AB
(分比定理)
10. 1a DC-BD=(DM+MC)~(BM-DM)=2DM.
AC-AB-AC-AG-GO
(@T€ * # 4«, ̈BM=NC, AB-AG.),
71. 13 M4 MH 11 BG GCXH, A GH=HC-Lac.
...GC= 24H(截我走理)
13.
24
BD
2DM
A&
BD
AG
DM
HO
AG:
··GH=AELEM (^XL***>AZAL)) BD:DM¬AE÷EM (*)
15.EDIIAB (分ᅀ两腰成比例之线,平行於底边)
(b) STE
(5)由一已知园之园周上两定桌,求作相等且行之两法。 已知AB园上两定桌.
(求作)過A. B作两平行数
AC, BDA AC=BD.
(作法) 1.联AB.
2.遇 A,B各作 AB的岳线
AC, BD 即為巧求。
•
CD; } <A+<D=ært. 25, 28+20=2kt (国内接四边形之对角正補)
<C=LD=rt. L (20).
4. ABDC萬矩形(因各内角均笃直角)
5. AC|| BD 1 AC=BD. (Ħ#{≥×¢¥++ ££82)
未完的人第六第三》