Which of the following is a micro-nutrient or a trace element?

Which of the following is not a macro-nutrient?

Mark the statements as true/false by choosing the correct option from the set $(I-IV)$ given below:
$I.$ Magnesium is a constituent of chlorophyll and helps to maintain the ribosome structure.
$II.$ Calcium is needed during the formation of mitotic spindle.
$III.$ Magnesium is essential for the photolysis of water.
$IV.$ Zinc helps in sugar translocation.

Which of the following micro-elements is absorbed by leaves?

In plants,excess of manganese may,in fact,induce deficiencies of ......... and .........

Sulfur is an important nutrient for the growth and productivity of which of the following crops?