生物 1997 年 DSE、CE 選擇題

1.

The dichotomous key below lists some features of four plants P, Q, R and S: 1a with flowers ........ P 1b without flowers ........ 2 2a with seeds ........ Q 2b without seeds ........ 3 3a with chlorophyll ........ R 3b without chlorophyll ........ S Which of the four plants is an alga?

2.

Which of the following are correct descriptions of the plant shown in the diagram below?

(1)It produces spores.

(2)It has roots and stems.

(3)It forms fruits.

3.

Which of the following processes is carried out by osmosis?

4.

The graph below shows the effect of the change in the external concentration of an ion on the concentration of the ion within some plant cells:

Which of the following conclusion(s) can be drawn from the graph?

(1)The ion is taken up by the cells against a concentration gradient.

(2)The uptake of the ion occurs only in living cells.

(3)The cell membrane becomes impermeable to the ion when the external ion concentration reaches 2 × 10⁻³ mol kg⁻¹.

5.

Which of the following processes in the human body does not involve enzymes?

6.

The diagrams below show three types of human cells:

All three types of cells

7.

The diagram below shows a certain stage of cell division:

Which of the following is correct?

	Type of cell division	Number of chromosomes in each daughter cell
	mitosis	2 pairs
	mitosis	4 pairs
	meiosis	2
	meiosis	4

8.

Which of the following is a correct comparison between holozoic and saprophytic nutrition?

	Holozoic nutrition	Saprophytic nutrition
	involves ingestion of food	no digestion of food
	digestion occurs outside the cells	digestion occurs inside the cells
	builds up complex organic food	breaks down complex organic food
	carried out by mammals	carried out by mosses

9.

Tapeworm is well adapted to its mode of nutrition because

(1)it secretes enzymes to digest food.

(2)it has large surface area for food absorption.

(3)it attaches itself to its host with hooks and suckers.

10.

The diagrams below show two types of teeth of an adult man. Which of the following statements about the teeth is incorrect?