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(d) More nutrients are not required by plants

Q7. Refer to the given outline of Nitrogen cycle.

Identify X and Y and select the correct statement from the following regarding
this.

(a) In process X, protein is converted into ammonia by the action of bacteria
while in process Y, nitrates present in the decaying remains get converted
into free nitrogen gas.
(b) In process X, nitrates present in the soil get converted into free nitrogen
gas while in process Y, protein is converted into ammonia by the action of
bacteria.
(c) Process X represents the conversion of ammonia into nitrates while
process Y represents the conversion of nitrates into free nitrogen gas.
(d) Process X represents the conversion of ammonia into nitrites while
process Y represents the conversion of complex organic compounds like
proteins into ammonia.

Q8. Nitrogen is used by plant for the production of -
(a) Chlorophyll
(b) Nucleic acid
(c) Both (a) and (b)
(d) Carbohydrates

Q9. Which nutrient does a plant require in more amount for the growth
(a) Nitrogen
(b) Zinc
(c) Argon
(d)Silicon

Q10. Which of the following natural processes plays a role in the nitrogen cycle?