Students in a biology course were asked to design an experiment to study the eff
ID: 62411 • Letter: S
Question
Students in a biology course were asked to design an experiment to study the effect of salt on seed germination. One group of students chose to use Mung beans for their experiments.
They designed an experiment to study the effects of salt on the germination of the seeds.
Effect of salt on the germination of Mung bean seeds.
Three treatments were used:
Treatment 1: 15 Mung bean seeds exposed to tap water during germination
Treatment 2: 15 Mung bean seeds exposed to .05M salt solution during germination
Treatment 3: 15 Mung bean seeds exposed to .1M salt solution during germination
All seeds were exposed to the same volume of solution and keep in the dark at 75F for 7 days.
Treatments were checked daily and the number of seeds that exhibited germination (appearance of the root) was recorded daily. Data collected is shown in the table below.
Seed Germination Rate (#seeds germinated)
Day
Treatment 1
Treatment 2
Treatment 3
1
1
0
0
2
3
2
0
3
7
5
1
4
14
9
3
5
14
11
5
6
14
12
8
7
14
12
10
Your Instructions
Using the data and information provided;
1. Identify which are the independent and dependent variables.
2. Identify which is the control group.
3) Based on your results, provide a brief description of the results of the experiment.
Seed Germination Rate (#seeds germinated)
Day
Treatment 1
Treatment 2
Treatment 3
1
1
0
0
2
3
2
0
3
7
5
1
4
14
9
3
5
14
11
5
6
14
12
8
7
14
12
10
Explanation / Answer
1. Salt concentration is the independent variable in this experiment.
Seed germination rate is the dependent variable in this experiment.
2. Number of mung beans used is the control group.
3. Based on the given data, you can conclude that 0.5 M salt solution shows a greater effect on seed germination rate.