1994 年
生物 · 共 59 題 · 點擊選項即時核對答案
The diagram below shows a potato plant:
Which of the following statements is correct?
Pollen grains are usually produced in large numbers so that
Directions: Questions 44 and 45 refer to the diagrams below which show the flower and the fruit of a mango plant:
Which of the following statements is correct?
Directions: Questions 44 and 45 refer to the diagrams below which show the flower and the fruit of a mango plant:
Which of the following features helps the dispersal of G?
Directions: Questions 46 and 47 refer to the diagram below which shows a longitudinal section of a broad bean seed:
Which of the following occurs when the seed germinates?
Directions: Questions 46 and 47 refer to the diagram below which shows a longitudinal section of a broad bean seed:
When the broad bean seed germinates, which of the following is INCORRECT?
Directions: Questions 48 and 49 refer to the graph below which shows the changes in the concentration of antibodies in the blood of a person with time:
The increase in the antibody concentration on day 7 might be caused by
Directions: Questions 48 and 49 refer to the graph below which shows the changes in the concentration of antibodies in the blood of a person with time:
The antibody concentration increased rapidly on day 21 because the person
The graph below shows the effect of temperature on the activity of salivary amylase:
Which of the following statements concerning salivary amylase is correct?
Three food chains in an aquatic ecosystem are shown below:
Which of the following statements is correct?