2001 年
生物 · 共 59 題 · 點擊選項即時核對答案
In many industrial countries, a lot of trees have been killed as a result of air pollution. Which air pollutant is the major cause of death of these trees ?
Questions 52 to 54 refer to the diagram below, which shows two experimental set-ups. Two shoots with flower buds were used and after two days, the buds in both shoots developed into flowers.
The mass of each shoot and the whole set-up were recorded at the beginning of the experiment and after two days. The table below shows the measurements taken :
| Whole set-up (beginning, g) | Shoot (beginning, g) | Whole set-up (after 2 days, g) | Shoot (after 2 days, g) | |
|---|---|---|---|---|
| Set-up 1 | 182.41 | 5.75 | 179.10 | 7.29 |
| Set-up 2 | 183.86 | 5.78 | 183.63 | 7.38 |
The change in mass of the whole set-up 1 during the experiment was mainly caused by
Questions 52 to 54 refer to the diagram below, which shows two experimental set-ups. Two shoots with flower buds were used and after two days, the buds in both shoots developed into flowers.
The mass of each shoot and the whole set-up were recorded at the beginning of the experiment and after two days. The table below shows the measurements taken :
| Whole set-up (beginning, g) | Shoot (beginning, g) | Whole set-up (after 2 days, g) | Shoot (after 2 days, g) | |
|---|---|---|---|---|
| Set-up 1 | 182.41 | 5.75 | 179.10 | 7.29 |
| Set-up 2 | 183.86 | 5.78 | 183.63 | 7.38 |
The change in mass of the shoots during the experiment was due to
Questions 52 to 54 refer to the diagram below, which shows two experimental set-ups. Two shoots with flower buds were used and after two days, the buds in both shoots developed into flowers.
The mass of each shoot and the whole set-up were recorded at the beginning of the experiment and after two days. The table below shows the measurements taken :
| Whole set-up (beginning, g) | Shoot (beginning, g) | Whole set-up (after 2 days, g) | Shoot (after 2 days, g) | |
|---|---|---|---|---|
| Set-up 1 | 182.41 | 5.75 | 179.10 | 7.29 |
| Set-up 2 | 183.86 | 5.78 | 183.63 | 7.38 |
Based on the results of this experiment, which of the following is a probable conclusion ?
The eye colour of Siamese cat is controlled by a pair of alleles. A cross between two brown-eyed cats produced four offspring, of which three had green eyes and one had brown eyes. Which of the following is correct ?
| Conclusion | Evidence | |
|---|---|---|
| Brown eye is dominant. | The phenotypic ratio of the offspring is 3:1. | |
| Brown eye is dominant. | Two brown-eyed parents produce green-eyed offspring. | |
| Green eye is dominant. | The phenotypic ratio of the offspring is 3:1. | |
| Green eye is dominant. | Two brown-eyed parents produce green-eyed offspring. |
The diagram below shows a pyramid of numbers of organisms in a habitat :
In which of the following food chains can this pyramid of numbers be found ?
Which of the following is not considered as a type of pollution ?
In recent years, fishermen are banned from fishing in the South China Sea in June and July. The purpose of this measure is to
Which of the following structures produce secretions that can protect the body from infection ?