生物 2004 年 DSE、CE 選擇題（第 2 頁）

11.

Questions 10 and 11 refer to the diagram below, which shows the ventral view of the human heart:

Which of the following will occur if vessel X is blocked as shown in the diagram ?

12.

The diet of many children contains only a small amount of fruit and vegetables. This may lead to

13.

Questions 13 and 14 refer to the photomicrographs below, which show the cross section of a stem under different magnifications:

A student first focused on the section under the microscope and saw the section as shown in I. In order to see the section as shown in II, the following steps are required. Arrange them in the correct sequence.

(1)Turn the nosepiece for an objective of higher magnification.

(2)Turn the coarse adjustment knob / fine adjustment knob.

(3)Adjust the position of the section on the stage.

14.

Questions 13 and 14 refer to the photomicrographs below, which show the cross section of a stem under different magnifications:

What is the function of cell type Y ?

15.

Questions 15 and 16 refer to the diagram below, which shows a set-up used by Eric to study osmosis:

If Eric carries out the investigation for four hours, what would be the change in the liquid level in the capillary tube with time ?

Graphs A to D: height of liquid level (cm) against time (h)

16.

Questions 15 and 16 refer to the diagram below, which shows a set-up used by Eric to study osmosis:

Which of the following can increase the rate of rise of the liquid level in the capillary tube ?

(1)Raise the water temperature to 30°C.

(2)Use a larger beaker with more water inside.

(3)Use a capillary tube with a smaller internal diameter.

17.

Questions 17 and 18 refer to the following situation: on a hot summer afternoon, the shoot of a herbaceous plant may become wilted for several hours and most stomata of its leaves are closed.

What is the advantage of the stomatal closure to the wilted plant ?

18.

Questions 17 and 18 refer to the following situation: on a hot summer afternoon, the shoot of a herbaceous plant may become wilted for several hours and most stomata of its leaves are closed.

The wilted plant usually restores its upright appearance in the late afternoon. This is because

19.

Which of the following processes does not require metabolic energy ?

20.

Questions 20 to 22 refer to the diagram below, which shows part of the human digestive system:

Which structures produce enzymes for digesting proteins in the alimentary canal ?