2007 年
生物 · 共 59 題 · 點擊選項即時核對答案
Which of the following statements about chromosomes are correct?
Which of the following are the changes found in the skin when there is a sudden drop in environmental temperature from 25°C to 10°C?
| Sweating | Capillaries beneath the skin | |
|---|---|---|
| decrease | less blood flow | |
| decrease | more blood flow | |
| increase | less blood flow | |
| increase | more blood flow |
Questions 33 and 34 refer to the diagram below, which shows the skeleton and the associated muscles of a human upper limb.
Which of the following correctly describes joint X?
Questions 33 and 34 refer to the diagram below, which shows the skeleton and the associated muscles of a human upper limb.
Which of the following is a correct description of structure Y?
| Property | Importance during movement | |
|---|---|---|
| elastic | allows the attached bones to move more freely | |
| inelastic | transmits forces to bone with minimum loss | |
| rich in protein | creates a smooth surface to reduce friction | |
| rich in glucose | releases more energy for muscle contraction |
A genetically modified rice is being developed so as to increase its harvest. This can be achieved by the insertion of a gene that can produce
Questions 37 to 39 refer to the diagram below, which shows a simplified nitrogen cycle.
Which of the following correctly identifies processes 2 and 4?
| Process 2 | Process 4 | |
|---|---|---|
| nitrification | decomposition | |
| nitrogen fixation | denitrification | |
| nitrogen fixation | decomposition | |
| nitrification | denitrification |
Questions 37 to 39 refer to the diagram below, which shows a simplified nitrogen cycle.
Microorganisms play an important role in the processes
Questions 37 to 39 refer to the diagram below, which shows a simplified nitrogen cycle.
Nitrogen can be found in animals as a component of
The following shows a label of a chemical fertilizer. Note: 1. Do not overfeed the plant with this fertilizer. 2. Shake before you use. 3. Use every 7 to 10 days. What may happen if we overfeed the plant with the fertilizer?
The film of water on the surface of human air sacs serves to