1992 年
生物 · 共 58 題 · 點擊選項即時核對答案
Which of the following does not show the true relationship between the organisms ?
| Organisms concerned | Relationship | |
|---|---|---|
| tapeworm and man | parasitism | |
| birds and caterpillars | predation | |
| algae and bacteria in lichen | mutualism | |
| barnacles attached to crabs | commensalism |
Questions 54 and 55 refer to the diagram below which shows some of the pathways in the nitrogen cycle :
Which of the following represents nitrogen fixation ?
Questions 54 and 55 refer to the diagram below which shows some of the pathways in the nitrogen cycle :
The organisms involved in process 4 are
Why is it necessary to add nitrogenous fertilizers regularly to a vegetable field but not to natural grassland ?
Compared with a sandy soil an equal volume of clay soil generally contains
The graph shows the yield of maize grain in relation to the amount of nitrogen fertilizer added to the soil :
What conclusion can be drawn from the graph ?
The amount of carbon in the carbon cycle
The root tip of a young seedling was marked with Indian ink at equal intervals of 2 mm from the tip as shown below :
After two days, the length of each zone was measured, and a graph was plotted. Which of the following graphs best represents the growth pattern of the root tip ?
