生物 2009 年 DSE、CE 選擇題

1.

When using a microscope for high power observation, we should focus on the specimen with a low power objective before using the high power objective. It is because under low power magnification,

(1)the field of view is larger.

(2)the light intensity is higher.

(3)it is easier to focus on the specimen.

2.

Which of the following descriptions about the cytoplasm is incorrect?

3.

The following diagram shows a human epithelial tissue:

Which of the following combinations correctly shows the possible location and function of this epithelial tissue?

	Location	Function of the epithelial tissue
	skin	to produce sebum
	trachea	to facilitate gas exchange
	stomach	to help the absorption of food
	oviduct	to aid the movement of the egg

4.

Which of the following processes would lead to the formation of acid rain?

5.

Fishermen have not been allowed to catch fish in a specific period of a year in the South China Sea since 1999. This policy aims to

6.

Which of the following ways cannot protect our environment?

7.

Organisms X, Y and Z form a food chain. The table below shows their total numbers and average dry masses in an ecosystem:

Organism	X	Y	Z
Total number of organisms	20	40	10000
Average dry mass of individual organism (g)	0.05	100	0.004

With reference to the information in the table, what do you think are the ecological roles of organisms X, Y and Z in this food chain?

X	Y	Z
primary consumer	producer	secondary consumer
producer	primary consumer	secondary consumer
secondary consumer	primary consumer	producer
secondary consumer	producer	primary consumer

8.

Which of the following descriptions about a gene are correct?

(1)It may undergo mutation.

(2)It is made up of DNA and proteins.

(3)It determines the types of proteins a cell makes.

9.

The table below shows the number of chromosomes in some human cells.

	Human cell P	Human cell Q	Human cell R
Number of chromosomes	23	46	0

Which of the following correctly identifies cells P, Q and R?

P	Q	R
sperm	white blood cell	red blood cell
red blood cell	white blood cell	sperm
white blood cell	sperm	red blood cell
sperm	red blood cell	white blood cell

10.

Which of the following is least likely to be a purpose of using genetically modified plants in food production?