Choose the correct pair regarding salt concentration in different water bodies:

  • A
    $(1)$ and $(2)$
  • B
    Only $(2)$
  • C
    Only $(1)$
  • D
    Only $(3)$

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Which of the following factors determine the percolation rate and water-holding capacity of soil?

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$-1^{\circ}C$ to $13^{\circ}C$ annual variations in the intensity and duration of temperature and $50$ to $250 \; cm$ annual variation in precipitation account for the formation of a major biome as:

$A$ - The salt concentration is less than $5$ (parts per thousand) in inland waters.
$R$ - The salt concentration is $30 - 35$ (parts per thousand) in the sea.

Which of the following is the most important abiotic factor in a pond ecosystem?

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