生物 2002 年 DSE、CE 選擇題（第 2 頁）

11.

Honey is not easily spoiled even without refrigeration because of its

12.

Apples are good for our health because they provide

(1)vitamins.

(2)minerals.

(3)dietary fibre.

13.

Which of the following correctly lists the mode of nutrition of a cow and a mushroom ?

14.

The liver is regarded as a digestive gland because it

15.

Questions 15 to 17 refer to the graph below, which shows the changes in pH of the dental plaque of a person after he has eaten some candies :

Calcium salts are lost from the enamel as a result of their reaction with

16.

Questions 15 to 17 refer to the graph below, which shows the changes in pH of the dental plaque of a person after he has eaten some candies :

Which of the following statements about the critical pH is correct ?

17.

Questions 15 to 17 refer to the graph below, which shows the changes in pH of the dental plaque of a person after he has eaten some candies :

According to the graph, which of the following can help to prevent tooth decay ?

(1)reducing the frequency of eating sugary food

(2)adding fluoride to drinking water

(3)brushing our teeth after eating

18.

Which of the following is a similarity between a human sperm and a male gamete of a flowering plant ?

19.

Which of the following food substances is/are absorbed directly without digestion ?

(1)vitamin C

(2)sucrose

(3)polypeptide

20.

Which of the following comparisons between the reproductive methods of yeast and Bauhinia is incorrect ?

	Budding of yeast	Seed formation in Bauhinia
	involves only one sex	involves two sexes
	meiosis not involved	meiosis involved
	involves one type of gametes	involves two types of gametes
	offspring genetically identical to parents	offspring genetically different from parents