A prokaryotic autotrophic nitrogen fixing symbiont found ina)Pisumb)Alnusc)Cycasd)CicerCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

A prokaryotic autotropbic nitrogen fixing symbiont found in cynobacteria. Which has symbiotic relationship with cycas are in the order nostocales. it's found in coralloid roots of cycas.
So option ' C ' is correct answer.

Answer

Cycas >symbiotic nitrogen fixing bacteria is CYANOBACTERIA

Answer

Anabaena cycadae is a BGA found in coralloid roots of Cycas. Anabaena is a genus of filamentous cyanobacteria that exists as plankton. It is known for its nitrogen fixing abilities, and they form symbiotic relationships with certain plants, such as the mosquito fern. They are one of four genera of cyanobacteria that produce neurotoxins, which are harmful to local wildlife, as well as farm animals and pets. Production of these neurotoxins is assumed to be an input into its symbiotic relationships, protecting the plant from grazing pressure.
A DNA sequencing project was undertaken in 1999, which mapped the complete genome of Anabaena, which is 7.2 million base pairs long. The study focused on heterocysts, which convert nitrogen into ammonia. Certain species of Anabaena have been used on rice paddy fields, proving to be an effective natural fertilizer

Answer

Prokaryotic Autotrophic Nitrogen Fixing Symbiont

Introduction:
Prokaryotic autotrophic nitrogen-fixing symbionts are microorganisms that have the ability to fix atmospheric nitrogen into a usable form for plants. They form a symbiotic relationship with plants, providing them with nitrogen while receiving nutrients and protection in return. One such symbiont is found in Cycas plants.

Cycas:
Cycas is a genus of gymnosperms that includes various species of cycads, which are primitive seed plants. They are known for their ability to form symbiotic relationships with nitrogen-fixing bacteria.

Prokaryotic Autotrophic Nitrogen Fixing Symbiont in Cycas:
The correct answer, option 'C', states that the prokaryotic autotrophic nitrogen-fixing symbiont is found in Cycas. This means that Cycas plants have a symbiotic relationship with a specific type of bacteria that can fix atmospheric nitrogen.

Importance of Nitrogen Fixation:
Nitrogen is an essential nutrient for plant growth and development, and it is required in large quantities. However, atmospheric nitrogen is not directly usable by most plants. Nitrogen fixation is the process by which atmospheric nitrogen is converted into a usable form, such as ammonia or nitrate. This process is carried out by nitrogen-fixing bacteria.

Symbiotic Relationship:
In the case of Cycas plants, they form a symbiotic relationship with nitrogen-fixing bacteria. The bacteria reside in specialized structures called root nodules, which are formed on the roots of the plant. The bacteria provide the plant with fixed nitrogen, while the plant supplies the bacteria with carbohydrates and other nutrients.

Autotrophic Bacteria:
Autotrophic bacteria are organisms that can synthesize their own organic compounds using inorganic substances as a source of energy. In the case of the prokaryotic autotrophic nitrogen-fixing symbiont found in Cycas, these bacteria are able to fix atmospheric nitrogen and convert it into a usable form for both themselves and the plant.

Conclusion:
In conclusion, the prokaryotic autotrophic nitrogen-fixing symbiont found in Cycas is a type of bacteria that forms a symbiotic relationship with the plant. This bacteria is able to fix atmospheric nitrogen, providing the plant with an essential nutrient for its growth and development.

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