Do all orchids have air roots?

Related questions

1. Are orchids low maintenance?
2. Are used coffee grounds good for orchids?
3. Why are orchids so expensive?
4. Are orchids good for air quality?
5. Do Orchids symbolize death?
6. How long does it take an orchid to rebloom?
7. Do you have to fertilize orchids?
8. Do orchids like humidifiers?
9. Do orchids bloom on the same stem?
10. Can orchids survive in just water?

Tags

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15. #roots
16. #environment
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20. #provide
21. #above
22. #water
23. #native
24. #surrounding