MCQ
Identify $X$ and $Y$ in figure.


- A$X$ = temperate forest, $Y$ = tropical forest
- B$X$ = arctic and alpine tundra $Y$ = desert
- ✓$X$ = coniferous forest $Y$ = grassland
- D$X$ = tropical forest $Y$ = coniferous forest.

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$I.$ Ethidium bromide
$II.$ Restriction endonuclease
$III.$ Agarose
$IV.$ $UV$ radiation
Choose the correct option: