Question

state and explain four precautions to be considered during the setup of the investigation on whether roots exert a pushing force strong enough to cause water to move up the stem of plants

Answer 1

The plant should be de-topped at least 4 cm above the surface of the soil.
The stump of the plant is tightly fitted with the apparatus.
Tube is filled with water, not completely but at least one-fourth
Remember to note the initial water level.
Note the final water level and draw interference by calculating the difference between two levels.