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Rhizobium leguminosarum is a nitrogen-fixing bacteria that occurs in the soil.

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Important Questions on Nutrition in Plants

EASY
Science>Biology>Nutrition in Plants>Replenishment of the Nutrients in the Soil
State whether the following statement is true or false:
All animals and fungi are autotrophs.
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Science>Biology>Nutrition in Plants>Replenishment of the Nutrients in the Soil
What is meant by 'nitrogen fixation'? State two ways in which nitrogen gas of the atmosphere can be 'fixed' in nature to get nitrogen compounds in the soil.
EASY
Science>Biology>Nutrition in Plants>Replenishment of the Nutrients in the Soil
Shalini sees an uprooted pea plant. She notices some swellings on roots called root nodules. What do these root nodules contain?
MEDIUM
Science>Biology>Nutrition in Plants>Replenishment of the Nutrients in the Soil
Lightning is one of the methods of:
MEDIUM
Science>Biology>Nutrition in Plants>Replenishment of the Nutrients in the Soil

Observe the difference between these two images and answer the following question.

Question Image

Name the plant that helps in the replenishment of soil. 

EASY
Science>Biology>Nutrition in Plants>Replenishment of the Nutrients in the Soil
Which one of the following helps in nitrogen fixation?
MEDIUM
Science>Biology>Nutrition in Plants>Replenishment of the Nutrients in the Soil
How do leguminous crops help in increasing soil fertility?
EASY
Science>Biology>Nutrition in Plants>Replenishment of the Nutrients in the Soil
Which of the following is an example of symbiosis?
MEDIUM
Science>Biology>Nutrition in Plants>Replenishment of the Nutrients in the Soil
Draw a neat, labelled diagram of nitrogen cycle in nature. Which natural phenomenon occurring in the sky is responsible for nitrogen fixation?
MEDIUM
Science>Biology>Nutrition in Plants>Replenishment of the Nutrients in the Soil
Name the microorganisms which can fix atmospheric nitrogen in the soil.
MEDIUM
Science>Biology>Nutrition in Plants>Replenishment of the Nutrients in the Soil
Radharaman is a farmer. He always grows leguminous crops in alternation with other crop plants. Why? 
MEDIUM
Science>Biology>Nutrition in Plants>Replenishment of the Nutrients in the Soil

Shalini sees an uprooted pea plant. She notices some swellings on the roots called root nodules.

What does the relation between the roots of leguminous plants and bacteria teach us? 

MEDIUM
Science>Biology>Nutrition in Plants>Replenishment of the Nutrients in the Soil
Name the micro-organisms which can fix atmospheric nitrogen in the soil.
EASY
Science>Biology>Nutrition in Plants>Replenishment of the Nutrients in the Soil
Rhizobium bacteria fix atmospheric _____ in the soil.
EASY
Science>Biology>Nutrition in Plants>Replenishment of the Nutrients in the Soil
How do nutrients get replenished in the soil?
EASY
Science>Biology>Nutrition in Plants>Replenishment of the Nutrients in the Soil
Rhizobium bacteria fixes _____ in the soil. 
MEDIUM
Science>Biology>Nutrition in Plants>Replenishment of the Nutrients in the Soil
The process of nitrogen fixation by bacteria does not take place in the presence of:
EASY
Science>Biology>Nutrition in Plants>Replenishment of the Nutrients in the Soil
Cotyledons are also called-
MEDIUM
Science>Biology>Nutrition in Plants>Replenishment of the Nutrients in the Soil
What is Rhizobium? What is its function? How does Rhizobium help farmers? Why do farmers prefer to sow leguminous plants? In which form do plants absorb nitrogen?
MEDIUM
Science>Biology>Nutrition in Plants>Replenishment of the Nutrients in the Soil
Name two leguminous plants which can fix nitrogen.