Light is excluded from a water culture experiment in order to________
- prevent overheating of the roots
- enable the roots to grow straight down
- prevent ionization of water molecules
-
prevent the growth of algae
The correct answer is: D
Explanation
Light is excluded from a water culture experiment in order to prevent growth of algae which will alter the composition of the solution. Light is typically excluded from a water culture experiment to prevent the growth of algae because algae require light for photosynthesis and therefore cannot grow without it; this is a key reason why researchers often cover their culture vessels with foil or keep them in dark conditions when studying plant roots in a water culture setup.