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how to investigate conditions needed for germination
four boiling tubes with some cotton wool at the bottom of each one
10 seeds on top of the cotton wool
set up each boiling tube
leave tubes for few days
how will the four boiling tubes look like
1 = water, oxygen, room temperature (control)
2 = no water, oxygen, room temperature
3 = water, oxygen, low temperature
4 = water, no oxygen, room temperature
how to remove water from tube 2
spray water on all cotton wools except this one
how to lower the temperature from tube 3
put it in a fridge
how to remove oxygen from tube 4
pour boiled water in the tube
and oil on top
what are the results
germination should only occur in tube 1
because all the conditions are needed for germination to occur