Given below are two statements:
Statement $I$: Diazotrophs are the nitrogen-fixing microorganisms,which are exclusively symbiotic.
Statement $II$: Organic fertilizers include farmyard manure,compost,and green manure.
In light of the above statements,choose the most appropriate answer from the options given below.

  • A
    Both statement $I$ and statement $II$ are correct.
  • B
    Both statement $I$ and statement $II$ are incorrect.
  • C
    Statement $I$ is correct and statement $II$ is incorrect.
  • D
    Statement $I$ is incorrect and statement $II$ is correct.

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Similar Questions

$A$: Plants absorb nitrogen from the soil in the form of salts.
$R$: Nitrogen is essential for the synthesis of proteins and nucleic acids.

Match the following and choose the correct combination from the options given.
Column $I$Column $II$
$a.$ Potassium$(i)$ Germination of pollen grains
$b.$ Molybdenum$(ii)$ Involved in synthesis of auxin
$c.$ Boron$(iii)$ Involved in stomatal movement
$d.$ Zinc$(iv)$ Constituent of ferredoxin
$e.$ Sulphur$(v)$ Component of nitrate reductase

Identify the correct pair:
Column-$I$Column-$II$
$P$. Phosphorus$I$. Splitting of water to liberate oxygen during photosynthesis
$Q$. Potassium$II$. Constituent of cell membranes and all nucleotides
$R$. Magnesium$III$. In more abundant quantities in the meristematic tissue,buds,leaves,and root tips
$S$. Manganese$IV$. Constituent of the ring structure of chlorophyll and helps to maintain the ribosome structure

$P - Q - R - S$

Select the correct match for $X$ and $Y$.
Column $X$Column $Y$
$(1)$ Magnesium$(P)$ Blood clotting
$(2)$ Molybdenum$(Q)$ Constituent of cysteine amino acid
$(3)$ Calcium$(R)$ Essential for nitrogen fixation
$(4)$ Sulphur$(S)$ Activation of enzymes

Consider the following statements regarding mineral nutrition:
$(a)$ Moderate decrease or increase of micronutrients causes deficiency and toxicity symptoms respectively.
$(b)$ Excess of manganese causes toxicity of iron, calcium and molybdenum.
$(c)$ $A$ macronutrient is said to be toxic when present below a critical concentration.
Which of the above statements are correct?

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