真四第弹六第一日五十月十年子壬暴夏
1973英文中學會考試題預習專欄
生物科
(四)
Brology (4);
nswers to the questions of las
k
Ans. 1
Mature Sporan gium
Spores
-Columella
Young
Sporan
-gium
Stolon
Sporangio phora
Rhizoids
A Mycelium of Mucor
Asexual
describ
Fragmentat.
r
reprod- und favour ion taction
Condat fa
-1ons.
Asexual Formation of Simple split sporangiop- § -ting the hore, spora-
cous ngium and
Plant
Godya
Sexual
repro-
spores.
Conjugation,
lunder un-
fuctionfavourable t
Sexua
conditions
Conjugation
ethod of two dins
ferent str lains accusa
Fusion af two motile gametes o The same kind-nappeng and a zygo spore 18 formed.
Conjugation, under un- favou conditions.
Conjugation of two
Direction of moveMEN|___
Looping Movement
招田橋 ®
-鄒星 日十二月一十年二七九一层公年一十六國民葫中宵教僑華
2. Which pair of the following isl not true?!
(A) paramecium: Unicellular
protozoa.
(B) Amoeba Multi-cellular
protozoa.
(C) Spirogyra: many-celled.
filamentous alga.
(D) Hydra: Multi-cellular/
coelenterate.
(2) Mucor: saprophytic fungus.
With reference to the figure below answer questions No.3---21
夏季橋準
(11) somersaulting movement-- The hydra may "tum head over heels." The base of its body turns, a somersault so as to grasp a support on the far side of the tentacles. Finally the body assumes the normal upright situations
*
Direct
veme
Somersaulting Movement
(b) Hydra feeds on small aquatic Inimals or insects such as water fleas. If the prey gets near to the tentacles of the hydra, It may be caught by the tentacles and held paralysed by the nematoblast. The tentacles have the ability LO sweep the prey to the mouth into the enteron where enzymes from the secretory cells of the end oden dissolve the food prey into pieces. The first stage of digestion in the enteron 15 termed extracellular digestion since it takes place out side the cells.
str
*
prot
The ast
ent gamet
of one cell of a strain fuses with that of the other strain forming ar Zygospore.
Protect A tough round A rectangu- 100 of capsule, call-lar resist→
[ed cyst./
ant capsule spore
called cyst
growth, gives rise to gives rise
a sporangi0- To a new Zygom
phore by sub- filament by apore sequent cell subsequent
division.
hell division
(c) Two differences between mucor and a flowering plant are explain- ed, as follows.
(1) There is no chlorophyll in a fungus mucor, whereas in a flower ing plant, there i rophy11.
chlo-
(11) The type of nutrición in mucor is saprophytic, Photosynth- esis is carried out in all flower ing plants to build up their food
(a). A hydra moves in response to the external stimuli. The two types or movement in a hydra are
(1) Looping----The bydra body 131 bent over until its tentacleg. touch the surface of a water weed, to which it is fixed. so that thai
hydra 1s bent in the shape of loop. Then the base of the body. releases its hold and marches forward towards and gear the tent. acles. The tentacles are now re leased and sway up. The animal walks along the surface of cal vator weed.
The flagella of the nutritive cells of the endoderm set up a current of water and draw the food particles into the cells in which food veculées nre formed and com-
digestion of food occurs.
This second stage of digestion is called intercellular digestion. Any undigested remains are eject- ed through the enteron out of the mouth by the water current set up by the flagella
Hydra performs asexual aid. sexual reproduction{-
(1) Asexual reproduction Fudding)l ----under favouac conditions hyd ra wall produce by budding. An elevated bulb appears half-way along the body of hydra, The bulo extends in length and in size with a hollow space inside being con- tinuous with the enteron of the parent hydra. At the extreme end of the bulb, the tentacles grow up from the periphery while ther base of the bulb becom constrict: -ed. Afterwards, the mouth breaks through the free end, and the bulb suddenly separates from the parent at the constriction point. A young hydra is produced and swims off (11) Sexual reproduction (gametic reproduction)----Hydra is a hemma- phrodite. The testes usually deve Top in the upper part of the body. When ripen, sperms are produced and swim to the ripe ovum in the ovary which is in the lower part of the body.
When the ripe sperm meets the ripe ovum, fertilization is said. to take place. Ine fertilized egg, protected by a thick wall of chiti sinks to the bottom of the pond. The young hydra grows and develops. inside the protective emerges by breaking through the chitinous covering. A mouth and tentacles are developed at one end of the hollow mass of the young. The parent hydra usually dies after the completion of fertilization. This type of reproduction occurs naturally in Edverse conditions,
Questions for this week
I. Multiple choice questions
Which of the following conditions is not necessary for life of a living organism?
(A) a suitable living environment. (B) EnergyŸ
(C) Food stuffs
(D) Carbon dioxide:
(E)) water or moisture.
10
7
V.S. of Hydra
In the figure, the testis and
ovary of the animal are indicated by labels:
(A) 4 and 7 respectively. (B) 7 and 5 respectively. (C) 5 and 4 respectively. (D) 4 and 6 respectively. (E) 4 and 5 respectively.
4. Which one of the following plays no part in the nutrition the above animal?
B) 201
5. The function of label 4 is
(A) to kill food prey.
to produce enzyme for tha? digestion of food.
(0) to produce spermatozoa forj
reproduction,
(D) to produce egg for reproduct-3
ions
(E) to form a bud in budding
reproduction.
6. During the process of gamet reproduction, the fusion of an egg and a sperm occurs
the structure label (B) in the structure label (C) in the structure label (D) in the structure label 7 (B) freely in water.
7. The body wall of the animal is indicated by labels.
(A) 1, 4 and 5
(B) 1, 3 and 7
(0) 8, 10 and 3
(D) 8, 9 and 10
(E) none of these
3.
part through which the prey is passed into the enteron o the Hydra is
(A) (B) 2 70) 3.
9. Mucor illustrates the type
of nutrition which is known as
parasitie -
(B) autotrophic (C) holophytic (D) xerophytic (=) saprophytic
10. Which one of the following:
statements 13 true for the conju gation in the Mucor?
(A) Spores are formed from the
different hyphae.
Two mycelia le side by side,
(0) Formation of two different
sporangia.
(D) Formation of two different
Zygospores.
(E) Conjugation of plus and min
strains.
M
11. Culture of Mucor may be obtain -ed from a piece of bread which is (A) kept moist..
(B) kept ary.
(0) kept in the sun.
(D) kept in water.
(E) sterilized
政府培養社會福利工作人才
設立訓練學院
明工
月春作
分即人
四可員
招訓
社院
年年不作工,焱進的炼心人員
至之組 就在睞 蕊理.範程]
【利辦酒
課,及格的才一学年咩球關燈中央
參與各項就會工作。 KHAREOTKAKE REKENESE (SHE<N•______ , 婚龍勝任愉快。目前,本港爾開大學的社會系,會每糸共同訴娩相藿數目的學生,使成爲工 至十11月十二日,期間週二及過四晚七時半至 句至明年三月分四期舉辦「青年小組領袖訓練課程」 ;不過,臀年從事孟合工作需要經過有染訓練,使服務者均一律尉迎。道所學院將來和兩大学此後者,均發給證書。願啟第一期將由本用世八日 心開設 明春卽可招生 社會福利署亦定由本月下 來愈繁,關英格央的問題正多兩點更多青年學院將採兩年制誅5-栃業期黹發給交證。該季青华工作與志願服務。 每日差包括五落大盡
·内特弑心由於人口稠密,本想之社會工作聚一夫人訓練中心開設,預料可於明年首次招生。第一降,恐序算礎,技巧,會年期的成長照發展, 及 名爲社會工作人員訓練學院 在戴麟趾夫人訓練中 院所接收的學生,不論是想入政府趨鬥志團 任何一期或多期均可,凡出席一期的全期课 九時半在任戴麟趾夫人練中心行,是主
当群,計有小組工作, 。课程每期各有不同的 ARESLERAN
作
BAKE SEKI KEBERSION KE ]
一就該方面杂度人材。 計劃成立之所會人員湖線學院,將在戴麟趾 搡密度之」,而青年工件人識及托思游工作人 ,政府擬設立一所社會工作人員訓練學院,以造棟而欲增進工作技能和理解力者。近年,社會科廿一心日歡止報名。凡年在十八十六具有屯图 福 利酒合辦理多科啓導認證修課程,作爲他們在職或以上强度的在母國在棠青年,均可報名參加。 至於侍從事社會工作但未有接受社會姊案眦爲「小組工作」。參加者每名收費三元,明代
患者
托作
思
爲
近
年
有,生院
受
起,
J
4
12.
3
1. secremang enzyme for extra-
cellular digestion of food.
2. reproducing asexually by opor
ulation.
a hypha of the body of the plant has no chlorophyll and). transverse septa.ZA
4. grows parasitically on moist
organic substance.
Which of the above is not true) for a mucor?
(A)=N
B)-2
(a) 3 (D) 4
(E) none
3.
1. Rhizoidal nypha
Stolon
3. Rhizome
4. Sporangium.
5. Sporangiophore.
Which one of the abot
is not a
part of the mycelium of a mucor?
(A) 1
(B) 2)
(a) 3
(D) 4
(E) S
14. The zygospores. -produced
CA
of mucor are
exually from
the fusion of two gametangia the fusion of two spores.
the fusion of two sporangia.
the fusion of two different, strains. E
(B) the
the coenocytic hyphae.
15. In the following Le
one is out of place?
(A) Rhizoid.
(B) Spore.
(C) Sporangium,
(D) Columella..
(E) Sporangiophore.
which
16. Absorption of food solution Into the hyphae of a mucor basically brought about by:
(B
D.
II.
Capillary action.
Permeability..
diffusion.
Osmosis.
} none of the above.
(a) What characteristics in common have the insects you have studied? Explain, with the aid of a labelled diagram, the outer features of a cockroach,"
(b) By describing the basic parts of the life history of a cockroach, state what is meant when the cock- roach 15 said to be “ incomplete. meta-morphosis 2