Petri dish Why 44 니라
Seedlings
Filter paper with
10 mm x 10 mm grid
Beaker
Auxin solution
measured
.
All five beakers were placed inside a dark cupboard for three days.
After three days the increase in the length of each plumule was
The average increase in length of the plumule in each beaker was
calculated and recorded in the table below.
The table below shows the results of the investigation after three days.
BEAKER
NUMBER
1
2
3
4.
5
AUXIN CONCENTRATION
IN PARTS PER MILLION
(ppm)
0,1
1
10
50
100
AVERAGE INCREASE
IN PLUMULE LENGTH
(mm)
1,5
3,2
4,8
2,3
0
3.2.1
For this investigation identify the
(a) Independent variable
(b) Dependent variable
3.2.2
State the purpose of the grid that was placed inside each petri dish.​