Question

Usual concentration of essential elements in higher plants according to

d.W. Rains

Answer 1

Answer:

for health and growth.

"a guide to good nutrition"

food or nourishment.

Answer 2

$\huge\underline\red{Answer}$

Calcium" is essential for the growth of root tips. Calcium is present in the cell walls in the form of 'calcium pectate'. It helps in holding the plant's cells together and for growing new cells.