Deficiency of . . . . . . causes death of shoot and root tips in plants.

Which of the following is $NOT$ a deficiency symptom of mineral nutrition?

Less concentration of which mineral causes delay in flowering?

Assertion : Deficiency of sulphur causes chlorosis in plants.
Reason : Sulphur is a constituent of chlorophyll,protein and nucleic acids.

Plants show certain morphological changes due to the absence of a specific element. These morphological changes are indicative of the deficiency of that particular element,which are called $........$ of the element.

Which of the following elements are responsible for delay in flowering?