Biology
Grade-7
Easy
Question
Nitrogen is converted before it can be utilized by plants. This process is known as
- Nitrification
- Denitrification
- Nitrogen fixation
- Immobilization
Hint:
Rhizobium is responsible for this process.
The correct answer is: Nitrogen fixation
- Nitrogen is important for the normal growth and metabolism of plants
- Nitrogen deficiency can be observed as chlorosis in plants
- Atmospheric nitrogen cannot be utilized by plants as such
- Nitrogen is converted into its derivatives by a process called nitrogen fixation
- In leguminous plants, nitrogen fixation occurs through a bacteria called rhizobium which is present in the form of nodules in the roots of the plants
Related Questions to study
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__________ are dissolved in soil water, which is absorbed by plant roots.
- Nitrogen
- Sulfur
- Ions
- Ammonium
__________ are dissolved in soil water, which is absorbed by plant roots.
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- Nitrogen
- Sulfur
- Ions
- Ammonium
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Match the following:

- i(III), ii(IV), iii(II), iv(I)
- i(IV), ii(I), iii(II), iv(III)
- i(III), ii(II), iii(IV), iv(I)
- i(II), ii(IV), iii(I), iv(III)
Match the following:

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- i(III), ii(IV), iii(II), iv(I)
- i(IV), ii(I), iii(II), iv(III)
- i(III), ii(II), iii(IV), iv(I)
- i(II), ii(IV), iii(I), iv(III)
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Which of the following elements is not obtained in the form of ions by most plants?
- Calcium
- Nitrogen
- Magnesium
- Phosphorus
Which of the following elements is not obtained in the form of ions by most plants?
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- Calcium
- Nitrogen
- Magnesium
- Phosphorus
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Which of the following is a way to obtain nitrogen for most plants?
- As ions
- As nitrate
- As ammonium
- All of the above
Which of the following is a way to obtain nitrogen for most plants?
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- As ions
- As nitrate
- As ammonium
- All of the above
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How do most plants get carbon from the environment?
- From carbon fertilizers
- Through the smoke
- As gaseous carbon dioxide
- All of the above
How do most plants get carbon from the environment?
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- From carbon fertilizers
- Through the smoke
- As gaseous carbon dioxide
- All of the above
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Scientists anticipate that without nitrogen fertilizers, we would lose up to ___________ crops.
- 90%
- Half
- One-third
- One-fourth
Scientists anticipate that without nitrogen fertilizers, we would lose up to ___________ crops.
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- 90%
- Half
- One-third
- One-fourth
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_____________ fix nitrogen in roots.
- Insects
- Animals
- Microbes
- Humans
_____________ fix nitrogen in roots.
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- Insects
- Animals
- Microbes
- Humans
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Indirectly, the excess nitrogen can harm ____________.
- Birds
- Insects
- Humans
- Farm animals
Indirectly, the excess nitrogen can harm ____________.
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- Birds
- Insects
- Humans
- Farm animals
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High amounts of nitrogen are absorbed from ___________.
- Leaves
- Soil
- Air
- All of the above
High amounts of nitrogen are absorbed from ___________.
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- Leaves
- Soil
- Air
- All of the above
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Nitrogen in excess cannot cause enough ______________.
- Stem structure
- Leaf structure
- Root structure
- Fruits
Nitrogen in excess cannot cause enough ______________.
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- Stem structure
- Leaf structure
- Root structure
- Fruits
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Which of the following is an effect of excess nitrogen in plants?
- Enhanced biomass
- Large leaves
- Wide stem
- Long roots
Which of the following is an effect of excess nitrogen in plants?
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- Enhanced biomass
- Large leaves
- Wide stem
- Long roots
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The insufficiency of which of the following hampers plant growth?
- Nitrogen
- Iron
- Cadmium
- Copper
The insufficiency of which of the following hampers plant growth?
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- Nitrogen
- Iron
- Cadmium
- Copper
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If ___________ are not present, plants cannot produce the specific proteins required by plant cells.
- Carbohydrates
- Amino acids
- Fats
- Glucose
If ___________ are not present, plants cannot produce the specific proteins required by plant cells.
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- Carbohydrates
- Amino acids
- Fats
- Glucose
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Which of the following is false about plant growth?
- Seeds germinate into seedlings
- Seedlings mature into adult plants
- A number of metabolic processes also occur with growth
- Plant growth is definite
Which of the following is false about plant growth?
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- Seeds germinate into seedlings
- Seedlings mature into adult plants
- A number of metabolic processes also occur with growth
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Seeds germinate into ______________.
- Adult plants
- Fruit
- Seedlings
- Larva
Seeds germinate into ______________.
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- Adult plants
- Fruit
- Seedlings
- Larva