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Seed Germination Experiment. How would different levels of temperature of water affect the rate of seed germination?

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Topic: Seed Germination Introduction: Seed germination plays an important factor in our ecosystem as it's when the seeds are dormant. The significance of germination is to protect the living plant material until conditions are right for it to emerge and grow to its full potential. For many plants, they go through sexual reproduction, and for this type of reproduction, survival is depended on the process of germination of their seeds. In order for seeds to actually germinate, there must be certain conditions that must be met, which include factors such as light, temperature and moisture. For this particular lab, the factor that will be taken into consideration is the different levels of temperature of water that is used to germinate the seeds. Problem: How would different levels of temperature of water affect the rate of seed germination? Materials: - 6 Petri dishes/any other types of dishes - 3 pieces of paper towel - 60 Dry seeds (long beans seeds) - Thermometer - Water - Location with sunlight - 6 cups Variables: Independent Variables: - the different levels of temperature of water Dependent Variables: - The amount of seeds that germinated for each different level of temperature of water Constant Variables: - The type of seed that's being used - The amount of seed used placed in ...read more.


Diameter of Radicle Qualitative Observations Appearance of Seeds - light golden brown with white lining - hard texture Appearance of Seeds (After) - most of the golden brown texture seemed to disappear - roots were beginning to appear, as they were stringy and delicate pieces - the roots were white/yellow colour Conclusion/Evaluation The purpose of seed germination is that it activates an enzyme, increases the respiration rate and duplicates the plant cells. As the process of germination continues, the embryo becomes too large and the seed coat eventually bursts open. As the bursting occurs, the growing seed emerges and the tip of the root is the first thing that will abrupt. The roots are the first thing that will emerge because this will anchor the seed in place, and allow the embryo to absorb water and nutrients from the surrounding soil. After experimenting with this lab, one can conclude that the seeds mostly germinated that was watered with the water temperature of 15�C-20�C, which is about 80%. There were no seeds that were germinated in the dish that was watered with the water temperature being 2.6�C. In order for seeds to germinate, certain conditions have to be met. ...read more.


Lastly, another source of error is the actual measurement of the radicle (roots), the measurement of water and the amount of water used to water the seeds. On a daily basis, one needs to water the seeds and this could have affected the results because the same temperature of water used to water the seeds wasn't used at a constant rate. This could have affected the results with the number of seeds that actually germinated and the length of the root. Modifications that could be done include using the thermometer and measuring the temperature of the water each time that one goes to water the seeds. Also, another modification that could have been used is to use a beaker to obtain the right amount of water, so that it could be as close as possible to obtain a constant amount of water being used. Lastly, when using the paper towel to place the seeds inside, make sure that the whole part of the paper towel is watered, so that all the seeds get watered. This will increase the rate of germination, allowing more seeds to germinate. If these modifications are taken into consideration, which means this lab would be more successful. ?? ?? ?? ?? ...read more.

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