In addition to known essential elements, there are some beneficial elements. These are required by the |
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a) |
Small plants |
b) |
Very small plants |
c) |
Higher plants |
d) |
All of the above |
In addition to known essential elements, there are some beneficial elements. These are required by the |
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a) |
Small plants |
b) |
Very small plants |
c) |
Higher plants |
d) |
All of the above |
(d) In addition to the 17 essential elements, there are some beneficial elements such as sodium, silicon, cobalt and selenium. They are required by higher plant |