2011 年
生物 · 共 59 題 · 點擊選項即時核對答案
Which of the following statements about glucagon is/are correct?
Which of the following processes in the human body is/are catabolic?
Which of the following structures are genetically identical?
The following are some steps in genetic engineering:
Arrange the above steps in the correct sequence.
Which of the following conditions are necessary for the building up of transpiration pull in plants?
When the relative humidity of air decreases, which of the following rates in plants will increase?
In a fire accident, during which period of time in the following graph would a large amount of hot smoke rush into the lungs?
The diagram below shows a nephron. The percentages of proteins and urea in fluids taken from different parts of the nephron are shown in the following table:
| Part from which the fluid is taken | Percentage of proteins in the fluid | Percentage of urea in the fluid |
|---|---|---|
| (1) | 0 | y |
| (2) | 9 | 0.05 |
| (3) | x | 0.05 |
Which of the following combinations correctly shows the values of x and y?
| x | y | |
|---|---|---|
| 9 | 0.05 | |
| 0 | 0.05 | |
| 9 | 0.25 | |
| 0 | 0.25 |
Questions 50 to 52 refer to the following experimental set-up, used for studying the effect of magnesium deficiency on the growth of the young seedlings:
Young seedlings should be used for this experiment because
Questions 50 to 52 refer to the following experimental set-up, used for studying the effect of magnesium deficiency on the growth of the young seedlings:
A control set-up is needed for this experiment. The control set-up should be the same as the experimental set-up except that in the control set-up,