生物 2011 年 DSE、CE 選擇題（第 4 頁）

31.

The maternal blood and the foetal blood are separated in the placenta. This feature

32.

Which of the following graphs shows the change in the thickness of the uterine lining of a pregnant woman from the beginning of the last menstruation to the time before child birth?

33.

The genetic make-up of the X chromosome of a boy is found to be different from that of his non-identical twin brother. This is most possibly due to

34.

The diagram below shows the male reproductive system:

Which labelled structure(s) is/are involved in producing semen?

35.

The diagram below shows the delivery of a baby assisted with forceps:

Which of the following is the most likely condition for this method to be needed in assisting delivery?

36.

The diagram below shows organism X:

Which of the following is not a characteristic of the kingdom to which organism X belongs?

37.

Questions 37 and 38 refer to the diagram below, which shows a certain stage of cell division:

Based on the diagram, which of the following combinations correctly shows the type of cell division illustrated and the reason for your choice?

	Type of cell division	Reason
	mitotic cell division	There are duplicated chromosomes.
	mitotic cell division	There is a lining up of the chromosomes in the middle of the cell.
	meiotic cell division	There is a pairing of the homologous chromosomes.
	meiotic cell division	There is a separation of the homologous chromosomes.

38.

Questions 37 and 38 refer to the diagram below, which shows a certain stage of cell division:

Which of the following shows the daughter cell of this cell division?

39.

Organisms X, Y and Z form a food chain. The following table shows the concentrations of DDT (a non-biodegradable insecticide) in organisms X, Y and Z:

Organism	X	Y	Z
Concentration of DDT (ppm)	25	0.015	1600

With reference to the information in the table, which of the following combinations correctly shows the ecological roles of organisms X, Y and Z in this food chain?

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

40.

Which of the following statements about hormonal coordination is correct?