Correct option is B
The correct answer is: (B) Fern
Explanation:
Azolla is a type of aquatic fern that belongs to the family Azollaceae. It is a small, free-floating, fast-growing water fern that forms a symbiotic relationship with the nitrogen-fixing cyanobacterium Anabaena azollae.
This ability makes Azolla an excellent biofertilizer for rice paddies, as it enhances nitrogen levels in the soil naturally.
Information Booster:
is commonly used in paddy fields as a green manure.
It helps in biological nitrogen fixation, reducing the need for synthetic fertilizers.
It is also used as livestock and poultry feed due to its high protein content.
Knowledge Booster (Other Option Information):
Algae:
Algae are simple photosynthetic organisms found in water. Unlike ferns, Examples include Spirogyra, Chlorella, and Ulva.
Tree:
Trees are large woody plants with a single trunk and branches. They belong to various families like Fabaceae (Neem), Moraceae (Peepal), and Myrtaceae (Guava).
Fruit:
Fruits develop from the ovary of a flower and contain seeds. Examples include Mango, Banana, and Apple.
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