Which of the following element is/are included as macronutrient elements in plants A. Zinc B. Oxygen C. Phosphorous D. Magnesium?

A and B
B and D
A, B and C
B, C and D

LohaHridoy

4 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 4 : B, C and D

Some elements are considered absolutely essential for plant growth and metabolism.
There are 17 essential elements which are broadly divided into 2 groups based on their requirement:
- Macronutrients - They are required in large amounts in plant body. These include carbon, hydrogen, oxygen, nitrogen, phosphorous, sulphur, potassium, calcium and magnesium.
- Micronutrients - These are required in very small amounts and are called trace elements. They include iron, manganese, copper, molybdenum, zinc, boron, chlorine and nickel.
Some other beneficial elements may also be present in higher plants like sodium, silicon, cobalt and selenium.

Oxygen -
- It is obtained mainly from CO₂ and H₂O.
- It is used up in synthesizing various organic compounds like glucose (C₆H₁₂O₆).
Phosphorus -
- It is absorbed by plants from soil.
- It is required for the formation of nucleic acids (DNA and RNA) and proteins.
- It is also present in cell membranes.
Magnesium -
- It is an important element for the formation of chlorophyll molecule.
- It also activates various enzymes related to photosynthesis and respiration.
Zinc -
- It is required by plants in very small amount for the synthesis of the plant hormone auxin.

4 views Answered 2022-09-04 04:29

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