The correct answer is Option (1) -A-ii, B-iii, C-iv, D-i
| COLUMN 1 |
COLUMN 2 |
| A. Azolla |
ii. Symbiotic association with N2 fixing cyanobacteria |
| B. Baculoviruses |
iii. Biological control agents |
| C. Glomus |
iv. Symbiotic association of fungus with plants |
| D. Rhizobium |
i. Symbiotic N2 fixer in legumes |
- A. Azolla - ii. Symbiotic association with N2 fixing cyanobacteria: Azolla is a small aquatic fern that forms a symbiotic relationship with nitrogen-fixing cyanobacteria (Anabaena). This relationship allows Azolla to thrive in nitrogen-poor environments, making it beneficial in rice paddies to enrich the soil with nitrogen.
- B. Baculoviruses - iii. Biological control agents: Baculoviruses are a group of viruses that specifically infect insects. They are used as biological insecticides because they target and kill pest insects without harming other organisms, making them an environmentally friendly pest control option.
- C. Glomus - iv. Symbiotic association of fungus with plants: Glomus is a genus of arbuscular mycorrhizal fungi that forms symbiotic relationships with the roots of most plants. These fungi help plants absorb nutrients, particularly phosphorus, from the soil, while the plants provide the fungi with carbohydrates.
- D. Rhizobium - i. Symbiotic N2 fixer in legumes : Rhizobium is a genus of bacteria that forms symbiotic relationships with leguminous plants. These bacteria fix atmospheric nitrogen into a form that plants can use, thus enhancing soil fertility and reducing the need for chemical fertilizers.
|
