Question

Which of the following is not a biofertlizer?

1)Rizhobium
2)Nostic
3)Micorhizza
4)Agrobacterium​

Answer 1

Answer:

3. Nostic

Explanation:

Answer 2

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Which of the following is not a biofertlizer?

1)Rizhobium

2)Nostoc

3)Micorhizza

4)Agrobacterium

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Option.4

Agrobacterium is not a biofertlizer.

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Biofertilizers:-

• Biofertilizers are those fertilizers which increases the productivity of a plant.

There are many types of biofertilizers like

• Some are free living
• Some are in ghe form of cynobacteria
• Some are associated with roots of leguminace plants.

Now we will see the given options,

Option.1(Rhizobium)

Rhizobium is biofertilizer because it increases the uptake of nitrogen by plant this is one of the function of biofertilizers.

Rhizobium is one of that which remain in association with roots of leguminase plants.So that means they help in in nitrogen absorption.

So option.1 is ❌

Option.2(Nostoc)

Nostoc is also one which help in the absorption of nitrogen similarly.

So option.2 is ❌

Option.3(Mycorhizza)

Mycorhizza is fungi that remains associated with plants and that help in more and more absorption of nutrient from the soil.

So Option.3 is ❌

Option.4(Agrobacterium)

Agrobacterium is the bacterium which had the capability to infect plant.

When the infect the plant they incorporate their DNA into Plant DNA.

They causes "Crown Gell " disease .The reason they cause this disease because they have a Ti plasmate".

Ti plasmate is a extra chromosomal plasmate.And these can transfer from one organism to or easily.

So option.4 is..✅

So ,

The answer of your question is option.4