#nitrogen cycle

BOTANY

Which type of bacteria plays a crucial role in the nitrogen cycle by oxidizing ammonia to nitrites?

Nitrosomonas is a nitrifying bacterium that converts ammonia into nitrites, playing a key role in the nitrogen cycle. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.

Ref: NCERT Biology Textbook - Latest Edition for Academic Session 2026-27 (Botany section, Rationalized Textbook for Class XI and XII), Chapter: Biology - Botany portion (Latest NCERT Textbooks for Academic Session 2026-27 -

View Details

Ecosystem Services and Functions

Which of the following is a correct statement about the nitrogen cycle?

Denitrification is the microbial process that converts nitrates back into nitrogen gas, returning it to the atmosphere.

Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Ecosystem Services and Functions

View Details

Ecosystem Services and Functions

What is the role of decomposers in the nitrogen cycle?

Decomposers release nitrogen from dead organisms and organic matter into the soil, making it available for plants.

Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Ecosystem Services and Functions

View Details

Nutrient Cycling - Carbon Phosphorus and Ecological Succession

Which of the following is a correct statement about the nitrogen cycle?

Denitrification is the process in which bacteria convert nitrates back into nitrogen gas, returning it to the atmosphere.

Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Nutrient Cycling - Carbon Phosphorus and Ecological Succession

View Details

Nutrient Cycling - Carbon Phosphorus and Ecological Succession

Which of the following statements about the nitrogen cycle is incorrect?

Plants cannot absorb atmospheric nitrogen directly; they rely on nitrogen-fixing bacteria to convert it into a usable form.

Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Nutrient Cycling - Carbon Phosphorus and Ecological Succession

View Details

Nutrient Cycling - Carbon Phosphorus and Ecological Succession

Which of the following is an incorrect statement about the nitrogen cycle?

Plants cannot absorb nitrogen gas directly from the atmosphere; they depend on nitrogen-fixing bacteria to convert it into usable forms.

Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Nutrient Cycling - Carbon Phosphorus and Ecological Succession

View Details

Nutrient Cycling - Carbon Phosphorus and Ecological Succession

Which of the following is a correct statement about the nitrogen cycle?

Denitrification is a microbial process that converts nitrates into nitrogen gas, returning it to the atmosphere.

Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Nutrient Cycling - Carbon Phosphorus and Ecological Succession

View Details

Decomposition - Process and Factors

Which of the following statements about the nitrogen cycle is correct?

Denitrification is the process by which nitrates are converted back into nitrogen gas by bacteria, releasing it into the atmosphere.

Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Decomposition - Process and Factors

View Details

Decomposition - Process and Factors

Which of the following statements about the nitrogen cycle is incorrect?

Plants cannot absorb nitrogen gas directly from the atmosphere; they depend on nitrogen-fixing bacteria.

Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Decomposition - Process and Factors

View Details

Decomposition - Process and Factors

Which of the following is an incorrect statement about the nitrogen cycle?

Plants cannot absorb nitrogen directly from the atmosphere; they rely on nitrogen-fixing bacteria to convert nitrogen into usable forms.

Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Decomposition - Process and Factors

View Details

Population Interactions - Competition - Competitive Exclusion

Which of the following statements about the nitrogen cycle is correct?

Nitrogen fixation by bacteria converts atmospheric nitrogen (N₂) into ammonia (NH₃), making it available for plants.

Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Competition - Competitive Exclusion

View Details

Organism and Environment - Major Biomes Abiotic Factors

Which of the following statements about the nitrogen cycle is correct?

Nitrogen fixation by bacteria converts atmospheric nitrogen into ammonia, which can be used by plants.

Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Organism and Environment - Major Biomes Abiotic Factors

View Details