MCQ
Which is correct about nitrogen fixation by legumes. They fix nitrogen through
- ✓Specialised bacteria in their roots
- BSpecialised bacteria in their leaves
- CIndependent of bacteria that live in their roots
- DThe statement is wrong
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$I.$ Group of independent, interacting populations of same species
$II.$ Group of independent and interacting populations of same species in specific area
$III.$ Group of independent interacting populations of different species in a specific area
$IV.$ Group of independent and interacting populations of different species in different area
Select the correct option
| | Column A | | Column B |
| i. | Lady bird | a. | Methano bacterium |
| ii. | Mycorrhiza | b. | Trichoderma |
| iii. | Biological control | c. | Aphids |
| iv. | Biogas | d. | Glomus |