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8.Microbes in Human Welfare
medium
Assertion : Leguminous plants are nitrogen fixers.
Reason : Leguminous plants have Rhizobium in their root nodules.
A
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
B
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
C
If the Assertion is correct but Reason is incorrect.
D
If both the Assertion and Reason are incorrect.
(AIIMS-1997)
Solution
The Rhizobium bacteria converts the atmospheric nitrogen into soluble nitrates that is absorbed by the plants. Soybean root nodules, contain billions of Bradyrhizobium bacteria.
Standard 12
Biology
