$Ca^{2+}$ is an essential element in plants. The major function it performs is

  • A
    Selective permeability of the cell membrane
  • B
    Maintenance of the cell turgidity
  • C
    Energy transfer
  • D
    Increases hardness of the cell wall

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Which of the following elements is a constituent of biotin?

Potassium is required by which of the following regions of plants?
$I.$ Meristematic tissues
$II.$ Buds
$III.$ Leaves
$IV.$ Root tips

Which of the following mineral elements is a component of ferredoxin?

Statement $P$: Phosphorus is essential for normal growth and reproduction in our body.
Statement $Q$: Copper is important in the synthesis of chlorophyll in plants.

In green plants,boron is required for:

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