Question

All plants require nitrogen for:
(A) Reproduction
(B) Photosynthesis
(C) Transpiration
(D) Growth

Answer 1

Hint: The plants are the autotrophic organisms since they produce their own food by the process of the photosynthesis. It uses the abiotic factors like sunlight, minerals, water etc. to prepare their food. They produce their food and also provide food to the other organisms that depend on them.

Complete Answer:
Nitrogen is the import component that is required for plant survival. The nitrogen in the soil is fixed by the soil microbes especially bacteria by the decomposition of the dead matter in the soil and it is present in the healthy soil and the plants get them utilize them for their growth and also the fruits and the vegetable productions. Nitrogen is used by the plants by converting it into the amino acid.

Amino acids are the building block of the protein. These proteins are used for the growth and development of the plant tissues. And hence without the nitrogen the plants would not survive and they die. Nitrogen is also a major component in the chlorophyll, the photosynthetic pigment that traps the sunlight for the purpose of photosynthesis. Hence all the plants involve nitrogen for their purpose of the growth.

Thus, the option (D) is correct.

Note: More nitrogen content in the soil helps in the increase in the biomass like the stalk, leaves stem regions etc. but there is no root development. Phosphorous is utilized for the development of the roots that absorbs the water and the essential minerals from the soil.