Which one of the following roles is not characteristic of an essential element?

Match the following concerning essential elements and their functions in plants

Select the correct option.

Given mineral ions essential for the physiological activities of plant
$\mathrm{A})$ Nitrogen metabolism
$\mathrm{B})$ Synthesis of Auxins
$\mathrm{C})$ Activation of IAA oxidase enzyme
$\mathrm{D})$ Formation of Mitotic spindle

Answers respectively

Match the following

The correct answer is

Choose the correct answer from the options given below: 

What is the importance of iodine in our body?

Mention the No. of given physiological activities of plant have been essentially controlled by Zinc, Boron, Sulphur and Calcium respectively

$a)$ Synthesis of auxin
$b)$ Photolysis of ${\mathrm{H}}_2\mathrm{O}$
$c)$ Methionine constituent
$d)$ Stability of protein
$e)$ Uptake of calcium
$f)$ Regulation of metabolic activities
$g)$Pollen germination
$h)$Cell elongation
$i)$ Cell differentiation

Match the following:

The correct match is

The nitrogen cycle is given below. Identify A and B in it.

Consider the following statements i, ii, and iii regarding criteria for essentiality of the nutrients in plants:

i. The presence of essential element is must for plants to complete their life cycle.

ii. The role of the element can be replaced by another in their life cycle.

iii. The elements must be directly involved in the metabolism of the plant.

Choose the correct statement/s: