Question

The major portion of the dry weight of plants
comprises of
(a) nitrogen, phosphorus and potassium
(b) calcium, magnesium and sulphur
(c) carbon, nitrogen and hydrogen
(d) carbon, hydrogen and oxygen

Answer 1

Answer:

the major portion of the dry weight of plants comprises of calcium, magnesium and sulphur

Answer 2

Answer is option "d"

Explanation:

• Major elements or macronutrients are the elements, which are required in large amounts and form the plant body constituents. Carbon, hydrogen, and oxygen together establish about 94% of the absolute dry wieght of the plant.
• These elements form an integral part of complex organic molecules of plants. Carbon, hydrogen, and oxygen are important minerals, which form the cellulose (carbohydrate) framework of the plants are called a framework element.
• Hence, the right answer is option d "Carbon,hydrogen,oxygen".