1991 年
生物 · 共 60 題 · 點擊選項即時核對答案
Plants and animals living together in a certain area form
A soil sample is shaken in a jar of water and allowed to stand. The components of the sample finally settle as shown below :
The various components are
| P | Q | R | S | |
|---|---|---|---|---|
| humus | silt | clay | sand | |
| humus | clay | silt | sand | |
| silt | clay | sand | humus | |
| silt | humus | sand | clay |
Which of the following about humus is correct ?
Red tides may be caused by
Which of the following methods of food preservation involve a heating process ?
The diagrams below show an experiment to study the effect of an antibiotic on the growth of 4 types of bacteria (P, Q, R and S) :
Which type of bacteria is the least resistant to the antibiotic ?
Questions 57 and 58 refer to the table below which shows the number of outbreaks of food poisoning caused by 3 types of bacteria (X, Y and Z). The table also shows the foods associated with these outbreaks.
| Food | Bacteria X | Bacteria Y | Bacteria Z |
|---|---|---|---|
| Beef | 6 | 17 | 1 |
| Meat pies | 16 | 13 | 1 |
| Milk | 13 | 0 | 0 |
| Rice | 10 | 0 | 8 |
Which food is associated with the greatest number of outbreaks of food poisoning ?
Questions 57 and 58 refer to the table below which shows the number of outbreaks of food poisoning caused by 3 types of bacteria (X, Y and Z). The table also shows the foods associated with these outbreaks.
| Food | Bacteria X | Bacteria Y | Bacteria Z |
|---|---|---|---|
| Beef | 6 | 17 | 1 |
| Meat pies | 16 | 13 | 1 |
| Milk | 13 | 0 | 0 |
| Rice | 10 | 0 | 8 |
Among the outbreaks of food poisoning caused by bacteria Z, what is the percentage associated with beef ?
Questions 59 and 60 refer to the diagram below which shows the structure of a kidney tubule and its blood supply (arrows indicate the direction of blood flow) :
Which region has the highest blood pressure ?
Questions 59 and 60 refer to the diagram below which shows the structure of a kidney tubule and its blood supply (arrows indicate the direction of blood flow) :
In a healthy person, which of the following substances are found in region 1 but not in region 5 ?