Which of the following are nitrogen-fixing plants ? 1- Alfalfa 2. Amaranth 3. Chickpea 4. Clover 5. Purslane (Kulfa) 6. Spinach Select the correct answer using the code given below :

examrobotsa's picture

Submitted by examrobotsa on

Q: 48 (IAS/2022)

Which of the following are nitrogen-fixing plants ? 1- Alfalfa
2. Amaranth
3. Chickpea
4. Clover
5. Purslane (Kulfa)
6. Spinach
Select the correct answer using the code given below :

question_subject: 

Science

question_exam: 

IAS

stats: 

0,131,103,131,45,33,25

keywords: 

{'nitrogen': [1, 1, 0, 2], 'plants': [11, 0, 4, 4], 'alfalfa': [1, 0, 0, 0], 'spinach': [0, 0, 1, 0], 'clover': [0, 1, 0, 1], 'amaranth': [0, 0, 0, 1], 'chickpea': [0, 0, 0, 1], 'kulfa': [0, 0, 0, 1], 'purslane': [0, 0, 0, 1]}

  1. Nitrogen-fixing plants are the plants that can convert atmospheric nitrogen (N2) into a form that can be used by other plants, which is called fixed nitrogen. The process of nitrogen fixation is carried out by nitrogen-fixing bacteria that live in the roots of the plant or in the soil. These bacteria take in atmospheric nitrogen and convert it into a form of nitrogen that the plant can use.

    Out of the given options, the following plants are nitrogen-fixing plants:

  2. Alfalfa
  3. Chickpea
  4. Clover

  5. Clover is a legume that is commonly used as a forage crop and as a cover crop to improve soil fertility. It is a perennial plant that can fix atmospheric nitrogen in its roots.

    Therefore, the correct answer is option 1, 3 and 4 only.

    Alfalfa, also known as lucerne, is a legume that is commonly used as a forage crop for livestock. It is a perennial plant that can fix atmospheric nitrogen in its roots.

    Chickpea, also known as garbanzo bean, is a legume that is widely cultivated for its edible seeds. It is an annual plant that can fix atmospheric nitrogen in its roots.

 

Preparing for Future Exams: Learning from the Analysis of Past Questions

Concepts to be studied:

  • Nitrogen fixation
  • Legumes and nitrogen fixation
  • Agricultural practices and sustainability
  • Plant classification

Sources:

  • NCERT Biology textbooks for Class 11 and 12
  • Online resources such as the International Plant Nutrition Institute website and the Food and Agriculture Organization website

NCERT Biology textbook chapters:

  • Class 11: Chapter 13 - Photosynthesis in Higher Plants
  • Class 12: Chapter 14 - Ecosystem
  • Class 12: Chapter 15 - Biodiversity and Conservation

Reference book chapters:

  • "Plant Physiology" by Taiz and Zeiger - Chapter 12 on Nitrogen Fixation and Nitrogen Assimilation

Related concepts:

  • Photosynthesis
  • Plant growth and development
  • Soil nutrients
  • Sustainable agriculture