Assertion $A$: Leguminous plants increase soil fertility.
Reason $R$: Azotobacter fixes atmospheric $N_2$.
Reason $R$: Azotobacter fixes atmospheric $N_2$.
- A$A$ and $R$ are both true and $R$ is the correct explanation of $A$.
- B$A$ and $R$ are both true but $R$ is not the correct explanation of $A$.
- C$A$ is true and $R$ is false.
- D$A$ is false and $R$ is true.
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Similar Questions
Which of the following statements are incorrect?
$I.$ Hemoglobin,myoglobin,and cytochromes are iron-containing compounds.
$II.$ Copper is important for cell division in plants.
$III.$ Biotin and riboflavin are sulfur-containing vitamins.
$IV.$ Calcium is necessary for the structure of teeth and bones.
$V.$ Manganese is required in the structure of the phosphatase enzyme.
$I.$ Hemoglobin,myoglobin,and cytochromes are iron-containing compounds.
$II.$ Copper is important for cell division in plants.
$III.$ Biotin and riboflavin are sulfur-containing vitamins.
$IV.$ Calcium is necessary for the structure of teeth and bones.
$V.$ Manganese is required in the structure of the phosphatase enzyme.
Medium
View SolutionMatch Column-$I$ and Column-$II$ and choose the correct option given below the columns.
Column-$I$ (Element) Column-$II$ (Function) $A$. Calcium $I$. Required for ionic balance $B$. Boron $II$. Essential for constitution of nucleic acid $C$. Phosphorus $III$. Required for absorption of calcium $D$. Chlorine $IV$. Required to activate respiratory enzyme $E$. Manganese $V$. Required for synthesis of mitotic spindle
| Column-$I$ (Element) | Column-$II$ (Function) |
|---|---|
| $A$. Calcium | $I$. Required for ionic balance |
| $B$. Boron | $II$. Essential for constitution of nucleic acid |
| $C$. Phosphorus | $III$. Required for absorption of calcium |
| $D$. Chlorine | $IV$. Required to activate respiratory enzyme |
| $E$. Manganese | $V$. Required for synthesis of mitotic spindle |
MediumAIIMS 2013
View SolutionWhich of the following bacteria is associated with nitrogen fixation?
Medium
View SolutionWhat is nutrient immobilisation?
Medium
View SolutionMatch the following columns:
Column-$I$ Column-$II$ $1.$ Mycorrhiza $a.$ Free-living $N_2$-fixer $2.$ Nostoc $b.$ Phosphorus absorption $3.$ Azospirillum $c.$ Leguminous plants $4.$ Rhizobium $d.$ Autotrophic $N_2$-fixer
| Column-$I$ | Column-$II$ |
| $1.$ Mycorrhiza | $a.$ Free-living $N_2$-fixer |
| $2.$ Nostoc | $b.$ Phosphorus absorption |
| $3.$ Azospirillum | $c.$ Leguminous plants |
| $4.$ Rhizobium | $d.$ Autotrophic $N_2$-fixer |
Medium
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