ï»¿ What do you understand by heterotrophic mode of nutrition ?Â  from Biology Mineral Nutrition Class 11 Assam Board

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What do you understand by heterotrophic mode of nutrition ?Â

Heterotrophic nutrition : It is the nutrition in which organisms do not manufacture their own food but take food from external sources such as other living organisms or from dead and decaying matter. For example - animals are heterotrophicÂ

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Name the best known symbiotic nitrogen fixing bacterium.

Rhizobium.
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What is Hidden hunger in the case of plants?

Hidden hunger refers to a situation in which a crop needs more of a given nutrient yet has shown no deficiency symptoms. The nutrient content is above the deficiency symptom zone but still considerably needed for optimum crop production
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How is nitrogenase enzyme protected ?

The nitrogenase enzyme is very sensitive to the molecular oxygen. It requires anaerobic conditions to work. The leg-haemoglobin in the nodule acts as an oxygen scavenger just meainting the anaerobic condition needed by the enzyme.
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What type of condition is created by leghaemoglobin in the root modules of legumes ?

Anaerobic.
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Which pigment is present in the root nodules of legumes ?

Leghaemoglobin.
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