Which macronutrients do plants take from the air?

Name the best conductive tissue for mineral nutrients in plants.

How does leghaemolobin protect the enezyme nitrogenase?

Give main difference between influx and eflux of ions

Name the relationship in which two organisms live in close physical association and share mutual benefits.

Name the macronutrient which is component of all organic compounds, but is not obtained from soil.

How do insectivorous plants fulfil their nitrogen requirements?

Ammonification of nitrogen during nitrogen cycle is brought about by a special process. Identify the process

The nitrogen acts as a limiting nutrient for both natural and agricultural ecosystem. Comment.

Deficiency of mineral nutrition is not responsible for etiolation.Yes or No?If no then explain why?

Mention any two role of K⁺ ion in plants

What are the conditions necessary for fixation of atmospheric nitrogen by Rhizobium. What is their role in nitrogen-fixation?

Explain  how potassium and magnesium act as the major elements for the growth of plants. 

Assimilation of atmospheric free nitrogen does not occur directly in the higher plants. If agree justify.

Mineral elements play a paramount role in the performance and maintenance of life activities of a plant.If agree, Justify giving any four important reasons.

Mention the difference between passive and active salt absorption.

Describes nitrification along with the equations and the organisms involved in each step.

Name the most crucial enzyme found in root nodules for N₂-fixation. Does it require a special pink coloured pigment for its functioning? Elaborate.

In what form do plants absorb phosphorus from the soil?Name one cell organelle and one organic molecule that require phosphorus in the cell.List any two phosphorus deficiency symptoms in leaves.

Describe two important functions of each of the elements P, Fe, and Zn in green plants. Mention deficiency symptoms of any two of these elements.

Why is that certain plants deficiency symptoms appear first in younger parts of the plant, while in others they do so in mature organs?

Explain with examples macronutrients,micronutrients,beneficial nutrients,toxic elements and essential elements.

Hydroponics have been shown to be a successful technique for growing of plants, yet most of the crops are still grown on land. Why?