Investigating Tropisms Practical
Using seeds (like cress or mustard) to see how light and gravity influence the direction of growth.
How can you study geotropism without the influence of light?
What is Investigating Tropisms Practical?
"Tropism practicals are biological experiments that demonstrate how plant organs respond to external directional stimuli."
Which plant response is explained by auxin causing unequal growth in a shoot?
In a plant shoot, what happens to auxin when light shines on one side?
In a plant shoot, what happens to auxin when light shines on one side?
Growth Experiments
Place seeds in a dark cupboard to eliminate light as a variable.
Turn a Petri dish on its side to observe the roots growing downwards.
Use a clinostat to rotate the seeds to cancel out the effect of gravity.
Always remember to state the independent, dependent, and control variables for this practical.
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