Which of the following is a trace element required by most living organisms?
a) nitrogen
b) oxygen
c) carbon
d) hydrogen
e) magnesium

E) magnesium

Explanation: nutrients which plants require in little amount are called trace elements.example are molybdenum,zinc,iron, magnesium etc.

Magnesium functions in photosynthesis, activation of enzymes and carbonhydrate metabolism in plants.

It's deficiency be caused by high soil pH and it results in poor growth of plant.

tissue

explanation:

it is actually formed by geoup of cells which is tissue