11th Standard Syllabus & Materials

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TN 11th Tamil பீடு பெற நில் - செய்யுள் - குறுந்தொகை Important Questions And Answers Study Material - QB365 Set A

11th Standard English Medium Biology (Botany) Subject Mineral Nutrition Creative 3 Mark Questions with Solution Part - II

Published on: 26/06/2021

QB365 provides detailed and simple solution for every Creative Questions in class 11 Biology Subject. It will helps to get more idea about question pattern in every Creative questions with solution.

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Std: 11th Standard - Biology

chapter: - Creative Questions

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Questions:

Generic 3

5 x 3 = 15

Hydroponics is a successful technique of growing plants but most of the crops are still grown on land? Why?

Draw a experimental setup to show Aeroponics.

What is Calmodulin?

How are minerals classified based on mobility?

What is aeroponics?

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Answers Key:

Generic 3

5 x 3 = 15

1. The technique of growing plants in nutrient solution or hydroponics requires purified water and mineral nutrient salts. It is employed in commercial production of vegetables like tomato, seedless cucumber etc.
2. But the nutrient solution must be sufficiently aerated for optimum growth and minerals must be continuously added in the, solution. These activities are not needed for growing plants in the soil.
3. Further the technique is more expensive and may not be feasible to feed a large population.

Calmodulin is a Ca²⁺ modulating protein in eukaryotic cells. It is a heat stable protein involved in fine metabolic regulations.

1. Actively mobile minerals: Nitrogen,Phosphorus, Potassium, Magnesium, Chlorine, Sodium, Zinc and Molybdenum. Deficiency symptoms first appear on old and senescent leaves due to active movement of minerals to younger leaves.
2. Relatively immobile minerals: Calcium, Sulphur, Iron, Boron and Copper shows deficiency symptoms first that appear on young leaves due to the immobile nature of minerals.

This technique was developed by Soifer Hillel and David Durger. It is a system where roots are suspended in air and nutrients are sprayed over the roots by a motor driven rotor.