SCIENCE
ECOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The nitrogen cycle requires different types of bacteria.
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Nitrogen gas is converted to nitrates in plant leaves.
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Nitrogen cannot be cycled through living organisms.
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When plants and animals die, nitrogen is removed from the nitrogen cycle.
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Detailed explanation-1: -Denitrifying bacteria convert nitrates (NO3-) into nitrogen gas (N2 ). Denitrifying bacteria, microorganisms whose action results in the conversion of nitrates in soil to free atmospheric nitrogen. Options (b) statement is correct.
Detailed explanation-2: -Bacteria play a key role in the nitrogen cycle. Some species of nitrogen-fixing bacteria are free-living in soil or water, while others are beneficial symbionts that live inside of plants.
Detailed explanation-3: -Nitrogen fixing bacteria convert nitrogen gas (N2 ) into organic compounds. This statement is true because nitrogen fixation is the process by which atmospheric nitrogen is converted into nitrates, nitrites or ammonia that can easily be assimilated by plants.
Detailed explanation-4: -Which of the statements regarding the nitrogen cycle is true? Atmospheric nitrogen is absorbed through the leaves of plants. Denitrification occurs when a nitrogen containing compound is produced from nitrogen in the soil.
Detailed explanation-5: -Answer and Explanation: The correct answer: The statements about the nitrogen cycle which are FALSE is C. Photosynthesis is an important metabolic process that moves nitrogen from the atmosphere into living organisms in the nitrogen cycle.