The nodules present in the roots of a clover plant contain bacteria that convert i into ii. The statement above is completed by the information in row:
| Row | i | ii |
|-----|-----------|-----------|
| A. | ammonium | nitrogen |
| B. | nitrogen | ammonium |
| C. | nitrate | nitrite |
| D. | nitrate | nitrogen |
A
B
C
D
Answer (2)
The question is about the role of bacteria in the nodules of clover plant roots and how they assist in nitrogen conversion, which relates to the nitrogen cycle in biology.
The correct completion of the statement is found in Row B , where i is 'nitrogen' and ii is 'ammonium'.
These bacterial nodules contain nitrogen-fixing bacteria, primarily from the genus Rhizobium . These bacteria have a symbiotic relationship with the clover plant, meaning that both the bacteria and the plant benefit from this association.
What do the bacteria do? The bacteria take atmospheric nitrogen (N₂), which most plants cannot use directly, and convert it into ammonia (NH₃). This process is called nitrogen fixation .
How is ammonia converted? Once ammonia is produced, it is further converted by additional processes into ammonium (NH₄⁺), which is a form that the plant can absorb and use to make proteins and other essential compounds.
Why is this important? This conversion is crucial for the growth of clover and other leguminous plants, as it provides them with necessary nutrients that they could not otherwise acquire directly from the atmosphere.
In summary, the bacteria convert nitrogen into a usable form, which is beneficial for plant growth and helps maintain soil fertility. This symbiotic relationship is a key component of the nitrogen cycle in ecosystems.
The correct choice is Row B, where nitrogen is converted into ammonium by bacteria in clover root nodules. These bacteria, mostly from the Rhizobium genus, perform nitrogen fixation, which is essential for the growth of the clover plant. This process supports both plant health and soil fertility in ecosystems.
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