1995 年
生物 · 共 58 題 · 點擊選項即時核對答案
Questions 43 and 44 refer to the experiment below which attempted to study the conditions for seed germination. Equal numbers of broad bean seeds were placed in three different pots of soil. The conditions of the pots and the results were as follows :
| Pot | Water supply | Light | Temperature | Results after one week |
|---|---|---|---|---|
| 1 | ✓ | ✓ | 25°C | germination occurred |
| 2 | ✗ | ✓ | 5°C | no germination |
| 3 | ✗ | ✓ | 25°C | no germination |
Key : ✓ indicates the presence of the factor concerned ✗ indicates the absence of the factor concerned
Based on the above results, germination of broad bean seeds requires
Questions 43 and 44 refer to the experiment below which attempted to study the conditions for seed germination. Equal numbers of broad bean seeds were placed in three different pots of soil. The conditions of the pots and the results were as follows :
| Pot | Water supply | Light | Temperature | Results after one week |
|---|---|---|---|---|
| 1 | ✓ | ✓ | 25°C | germination occurred |
| 2 | ✗ | ✓ | 5°C | no germination |
| 3 | ✗ | ✓ | 25°C | no germination |
Key : ✓ indicates the presence of the factor concerned ✗ indicates the absence of the factor concerned
In pot 1, some seeds failed to germinate. What is the most probable reason for this ?
Which of the following is an advantage of vegetative propagation in flowering plants ?
Questions 46 and 47 refer to the diagram below which shows the longitudinal section of a flower :
Haploid cells are formed in
Questions 46 and 47 refer to the diagram below which shows the longitudinal section of a flower :
Which structure is responsible for receiving the pollen grains ?
Questions 48 and 49 refer to the diagram below which shows a foetus in the mother's body :
When the baby is born, which structures will be expelled from the mother's body ?
Questions 48 and 49 refer to the diagram below which shows a foetus in the mother's body :
Which structures are responsible for removing waste from the foetus ?
Which of the following statements about antibiotics are correct ?
In garden pea, the allele for tall stem (T) is dominant to the allele for short stem (t). A cross between a tall plant and a short plant gave rise to 92 tall plants and 106 short plants in the F1 generation. What is the genotype of the tall parent plant ?
Referring to the cross described in question 51, the actual result differs from the result expected based on Mendel's Law of Inheritance. This is because