Which of the following are considered micronutrients?

Name the minerals responsible for maintaining cation-anion balance in the plant cells.

Which element shows the given characteristics?
$(i)$ It maintains an anion-cation balance in cells.
$(ii)$ It is also involved in protein synthesis.
$(iii)$ It is required for the opening and closing of stomata.
$(iv)$ It is required for the maintenance of the turgidity of cells.

Which of the following is a micro-element in plants?

Which of the following is a significant role of nitrogen in plants?

Which mineral element is associated with the regulation of water in the blood?