生物 1992 年 DSE、CE 選擇題（第 3 頁）

21.

Questions 20 and 21 refer to the following plant produce :

(1)peanuts

(2)potatoes

(3)rice grains

(4)soya beans

Which type of plant produce is best for supplementing the diet of people in poor countries so as to reduce protein deficiency ?

22.

Which of the following food preservation methods is least effective in killing microorganisms ?

23.

Questions 23 and 24 refer to the experimental set-up below which shows the release of carbon dioxide from a small mammal :

Which of the following are the correct solutions for X, Y and Z ?

Solution X	Solution Y	Solution Z
potassium hydroxide solution	lime water	lime water
lime water	potassium hydroxide solution	potassium hydroxide solution
lime water	potassium hydroxide solution	lime water
potassium hydroxide solution	lime water	potassium hydroxide solution

24.

Questions 23 and 24 refer to the experimental set-up below which shows the release of carbon dioxide from a small mammal :

Which of the following would be the probable results of the experiment ?

Solution X	Solution Y	Solution Z
milky	clear	clear
clear	clear	milky
clear	milky	milky
milky	milky	clear

25.

The table below shows the tar and nicotine content present in the cigarette smoke of 5 brands of cigarettes :

Brand of cigarette	With filter (+) or without filter (−)	Tar (mg/cigarette)	Nicotine (mg/cigarette)
P	+	15	1.0
Q	−	33	2.1
R	+	20	1.3
S	+	22	1.4
T	−	38	3.2

Which of the following statements is correct ?

26.

Vital capacity is the maximum volume of air breathed out

27.

Which of the following shows the correct sequence of air passage into the lungs ?

28.

Questions 28 to 30 refer to the potometer shown below :

In setting up the potometer, the main reason for cutting the stem of the plant under water is to

29.

Questions 28 to 30 refer to the potometer shown below :

The following results are obtained when the set-up is put under two different environmental conditions M and N :

Condition	Time for the air bubble to travel from X to Y (s)
M	15
N	10

Which of the following shows the likely environmental conditions of M and N ?

	Condition M	Condition N
	dry and windy	humid and still air
	dry and sunny	humid and cloudy
	windy and sunny	still air and cloudy
	humid and cloudy	dry and sunny

30.

Questions 28 to 30 refer to the potometer shown below :

The table below shows the stomatal densities in the leaves of two plants P and Q. What would be the most likely time for the air bubble to travel from X to Y, other environmental conditions being the same ?

Plant	Number of stomata per cm² (upper epidermis)	Number of stomata per cm² (lower epidermis)
P	0	29 500
Q	4 000	28 000

	Time for P (s)	Time for Q (s)
	14	14
	17	11
	11	17
	0	14