In which technique are plants grown with their roots suspended in the air?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Aeroponics
In aeroponics, plants are grown without soil with their roots hanging in the air inside a closed chamber. The roots are sprayed from time to time with a fine mist of water containing the nutrients the plant needs.
Why the other options are incorrect
Option (1) Hydroponics — Incorrect. Plants are grown without soil with their roots dipped in a nutrient solution (water).
Option (3) Tissue culture — Incorrect. New plants are raised from small pieces of tissue on a nutrient medium in the laboratory.
Option (4) Aerophyte — Incorrect. Not a technique but a kind of plant (an air plant), often growing on another plant, that takes moisture from the air.