Bacteria that convert nitrogen gas into ammonia are __________ .


a. nitrifying bacteria
b. nitrogenous
c. nitrogen fixers
d. nitrification bacteria

Verified step by step guidance

1. Understand the process of nitrogen fixation, which involves converting nitrogen gas (N2) from the atmosphere into ammonia (NH3).
2. Identify the role of bacteria in the nitrogen cycle, specifically those that can convert nitrogen gas into ammonia.
3. Recognize that nitrifying bacteria are involved in converting ammonia into nitrites and nitrates, not in converting nitrogen gas into ammonia.
4. Consider the term 'nitrogen fixers' and its association with the conversion of nitrogen gas into ammonia.
5. Evaluate the options given and determine which term correctly describes bacteria that convert nitrogen gas into ammonia.

Key Concepts

Nitrogen Fixation

Nitrogen fixation is the process by which certain bacteria convert atmospheric nitrogen gas (N2) into ammonia (NH3), making it available for use by plants. This process is crucial for the nitrogen cycle, as most organisms cannot utilize nitrogen gas directly. Nitrogen-fixing bacteria, such as Rhizobium, often form symbiotic relationships with leguminous plants, enhancing soil fertility.

Types of Nitrogen-Related Bacteria

There are various types of bacteria involved in the nitrogen cycle, including nitrogen fixers, nitrifying bacteria, and denitrifying bacteria. Nitrogen fixers convert nitrogen gas into ammonia, while nitrifying bacteria oxidize ammonia into nitrites and then nitrates, which plants can absorb. Understanding these distinctions is essential for grasping the roles different bacteria play in soil health and nutrient cycling.

Role of Ammonia in Agriculture

Ammonia is a key nutrient for plants, serving as a building block for amino acids and proteins. The conversion of nitrogen gas into ammonia by nitrogen-fixing bacteria is vital for agricultural productivity, as it enriches the soil with essential nutrients. This process supports sustainable farming practices by reducing the need for synthetic fertilizers, promoting healthier ecosystems.